People keep saying that Nintendo always makes gimmicks on their consoles. My question is, why not? If you say "oh developers will find it hard to code for it", then you're right. But these developers are also very lazy. For one, they can't even optimize their games correctly.

What would you do if the PS5 and Xbox 4 both have screens on their controllers? People would buy it of course, and not care about the screen.

Remember the NES? The original model had a HUGE defect where the thing would just blink on and off again due to pin connectors wearing out. I think people tend to overlook this because it happened before the internet but it affects nearly every single NES ever made (original model).

Please. The Genesis/32X/Sega CD looked like an abortion! lol. Playstaion played CD's (a big deal) and offered games that had never really been seen before like Twisted Metal, Resident Evil, Metal Gear, Syphon Filter, GT etc. Sega focused on arcade ports and Japanese styled games like Nights and Panzor Dragoon which I have to admit, were awesome, but totally niche and geek in retrospect. 

Sony had the image and games that took the industry out of basements and into the mainstream. No one had done that yet. That's why they dominated.

Nintendo software fits Nintendo hardware like a glove. It's the synergy between the two that makes helps make the games so high quality. It wouldn't be the same on anyone else's hardware. Nintendo would not be able to optimise games so well on other people's hardware - note how multiplatform games are hardly ever properly optimised.

I've thought for a while this multiplatform thing is a con. Of course there are good multiplats, but to be frank they're rare. The real gems have always been the exclusives - the games that really show us what a particular piece of hardware is capable of. Multiplats are generally badly-optimised, phoned in, and developed by horrendous institutions like EA, Ubisoft and Activision who could not care less about the quality of the final product. They care more about hype and advertising than quality, and of course it works, because people buy their games no matter how bad they are.

You think these multiplats are going to mean something 20 years down the line? You think anyone will care about Watch Dogs? Actually, Watch Dogs is already irrelevant trash after 6 months. Yet people still rave about A Link to the Past - a game released over 20 years ago - today. That game still matters, and it'll still matter in another 20 years. I think that's somewhere closer to the true mark of a great game.

nitendo´s own hardware is way more limited in terms of hardware and they have yet to make a game that really needed the tabletcontroller

third party would also mean pc releases and that is the platform without any limits

This happened because people were blowing on their cartridges. The moisture would make the pins in the NES rust
We had 3 NES in our family. The 2 consoles that were not fed with games that were blown on  show no sign of that even today. My neighbours also did not.

The one that was tho already suffered from this problem after just  few years.

I am not sure if mishandling counts as defect.

Good games don't need to be exclusive to be remembered.

LucasArts-Adventures, Sierra-Adventures, Broken Sword, Sid Meier's Pirates!, Civilization, Populous, Syndicate, X-Com, Wing Commander, Doom, Duke Nukem, Quake, Unreal, Final Fantasy, Street Fighter, Jedi Knight, Diablo, Tomb Raider, Deus Ex, Tony Hawk's, Rayman, The Elder Scrolls, Need for Speed, Metal Gear Solid, Grand Theft Auto, Resident Evil, Half-Life, Knights of the Old Republic, Prince of Persia, Burnout, Max Payne, Hitman, FIFA, Madden, ...

And in 10 - 20 years we will remember games or series like Splinter Cell, Mass Effect, Assassin's Creed, Dead Space, Mirror's Edge, Call of Duty, Battlefield, BioShock, Guitar Hero, Rock Band, Portal, Batman: Arkham series, Red Dead Redemption, Deus Ex: Human Revolution, The Witcher, the newer GTA, Fallout and Tomb Raider games...

If the Watch Dogs series improves with the next games, many will care about that series. The same goes for Destiny and the next Titanfall games. The first Assassin's Creed game wasn't perfect either.

I would say your history on Sega decline is a little off.  The decline of Sega started with a failed console. The Saturn failed and then Sega tried hardware again with the Dreamcast, but even before it launched it was a very hard sell against the PS2 which was still a year off.  So you rapidly see Nintendo speeding down this same path.  Will Nintendo have another failed console and put themselves in a path where becoming a 3rd party goes from a smart business decision to a required act of desparation.

I havent seen one reason in this thread that is a real reason why Nintendo should stay 1st party. The closest is that they dont have the software development discipline to make quality software for more than 1 platform.   The claim is that unless they stay 1st party they would be in danger of making crappy software (as if Nintendo hasnt made crappy software in the past).

Hasn't this been beaten to death already?

Of course that's entirely arguable on both sides. I wholly prefer the exclusives that come to Nintendo systems, but that's entirely my preference on exclusives. I personally don't find it boring in the slightest. As far as features in the consoles, what features are you talking about? To me, they are gaming consoles, I could care less about many of the features beyond the gaming aspects. If multiplats are your most important part, then certainly of late, Nintendo consoles probably aren't your cup of tea.