i feel switch will be on par or do worse than wiiu

Every Mario Kart game has a different set of new stages also, while new mechanics and gameplay elements have been introduced over time such as 4 player splitscreen in MK64, two characters per Kart in Double Dash, online play in MKDS, online splitscreen in MKWii, new items, karts, and characters in every entry, different handling models, etc.

Playing Super Mario Kart and then playing Mario Kart 8 is day and night different, it's like going from Elder Scrolls Arena to Skyrim.

I'll add to that, MKWii added motion controls, MK7 added gliders and MK8 added anti-gravity along with 200cc.

It's 100% a contradiction to say games like Call of Duty & FIFA change with every installment then go on to say Mario Kart has remained the same.

So you didn't notice the different health systems, HUDs, game mechanics etc in the videos? If you think they looked the same, you may as well claim that all FPS' are the same, because there's someone holding a gun...

Mario Kart games are barely any different. I remember using blue shells and banana skins from "?" boxes while power sliding around a corner as Mario on Rainbow Road 20 years ago. Why can I still do just that? Whereas you know what I can't do in the latest CoD? Grab a health pack while fighting off Germans with my Garand. And I certainly haven't been able to shoot soldiers in zero-G in previous CoD's while deploying EMP grenades.

Gran Turismo has completely changed it's single player setup, changed its game engine several times, introduced damage and other features. Mario Kart instalments always do as little work as possible for each release, confusing "gimmick" with "unique selling point" e.g. Double-Dash, anti-grav etc If these features were something more than a gimmick, surely they would have been carried over to future games?

No, I'm neither deflecting or taking what you said out of context; you clearly just aren't aware of how your point isn't relevant. It doesn't matter that they sold a combined total of 80 million hardware units. What matters is that this generation has been the absolute worst for them, with their lowest selling handheld and the slowest ever selling home console. If you think those points can be ignored, you don't understand how businesses are valued as it shows their business plan and concept clearly have been complete failures. 

People like Mario Kart a lot more than Gran Turismo, so clearly those unique selling points aren't confusing. 

I only started playing the franchise since Double Dash, so I can't give my opinion on the older games, but the games change up enough to still be fresh:

- Double Dash introduced many new characters and character specific items and 2 players per kart. It also had a fun new battle mode with bob-omb blast.

- Mario Kart DS introduced remade retro courses alongside the new tracks, online, side missions and boss fights. 

- Mario Kart Wii introduced online splitscreen (loved this), motor bikes, wheelies, trick system for boosts and an extra drift boost for karts only. To me this game felt a bit too generic compared to the other Mario Kart games though. 

- Mario Kart 7 introduced coins, different kart parts to make your own unique vehicle and underwater and gliding sections. 

- Mario Kart 8 introduced anti-gravity, which allowed for some great course designs. It's also the first Mario Kart game to allow non-Mario characters like Link and the Inklings. There are also courses based on other Nintendo franchises like F-zero. They completely changed how battle mode works, but that change was terrible and they're fixing it now with Mario Kart 8 Deluxe. This Deluxe edition will also feature a completely new battle mode that involves the piranha plant. No further details are known though. There is also a new 200 CC mode in this game, it really does make the game harder but also more interesting at the same time. 

Oh and the 3DS isn't their slowest selling handheld, the gameboy lasted for two generations and it sold around the same pace as the 3DS, even slower before Pokémon got released on it. 

The hardware is too weak to compete and makes it nearly impossible to port over multi-platform games. Games look ugly and only play in low resolution, texture quality and framerate.

The price is to high, $199 is the highest price allowing to compete with the much stronger and better X1 and PS4 systems.

The non-replaceable battery is huge design flaw. 3 hours of game play with no chance to easily extend playtime is a joke.

No games.

Games don't look ugly, 1080p resolution is not low, it's probably the most common resolution games are played in these days and framerate is often 60fps which is much higher than its competitors.

The price might be too high at launch, but there's always room for price cuts. Nintendo could easily release a home console only version and a handheld only version. This would greatly reduce the price. 

And the battery life is 3-6 hours, just like the 3DS. It's not a joke.

As for no games: it will get Breath of the Wild, Mario Kart 8 Deluxe, Arms, Splatoon 2, Fire Emblem Warriors, Xenoblade Chronicles 2 and Super Mario Odyssey in its first year. That's far better than the Wii U. 

While Mario Kart always sells a lot, the issue is that none of the existing Nintendo IPs appear to be attracting new fans, as evident by the almost contradictory low sales of the Wii U, but the high sales of Nintendo IPs. Games like Gran Turismo and Call of Duty are great entry games into those genres and appeals to modern gamers. Mario Kart evidently does not.

Mario Kart has barely innovated over the last 25 years, and the changes made most certainly could have been implemented sooner. With regards to the track design in Mario Kart 8, this is nothing that wasn't seen in Wipeout Fusion, a game from 2002. So while Mario Karts has had slight changes made, it certainly has not changed nearly enough to be considered either innovative or arguably even acceptable - ultimately the gameplay is virtually identical throughout the entire series.

I've gone back and corrected the comment on the 3DS. As you say, it wasn't the slowest selling handheld, but it is indeed the lowest selling handheld. 

Sorry to hijack thread but i have a question i've been wanting to ask (which is vaguely on topic) and i haven't made enough posts to create my own!

What's happened to the PS4 Pro? I used to hear/read lots about it and then... nothing. Has it flopped like Wii U? I'm guessing the sales figures are pretty poor if Sony aren't publicising more.