Can you post links to your support your claim with facts and figures?

Eh, maybe for you. Many people hadn't played Hollow Knight before, it's a new experience to them. Okami is another masterpiece some people are experiencing for the first time now. The same applies to many other games, it's never a bad thing to re-release a great game.

I understand you, though. Of course, it's sad to not have many new exciting new games to look forward to. But you have to understand Nintendo is quite a limited studio in comparison to some other AAA developers, and even the most prolific companies have a hard time releasing loads of high-budget games for several years in a row in this day and age. Nintendo only had so much in 2017 because they had been preparing for it for all of the two years before, and it was obvious they blew out most of their load - and even then, Xenoblade 2 was clearly rushed. 2018 was simply never going to come close to living up. You can either be frustrated about that, or continue to enjoy the console with all of the great experiences it offers.

From March-July in 2017 it sold 4.8 million, this year it has sold 4 million in the same timeframe. So it's lagging by almost 20%.

Switch is in front without any big releases, MK8D is the bestselling game in France this year, not even God of War could beat that year-old game While it's not yet whooping the PS4s ass, it shows that Sony can't beat the Switch even with many high-profile releases versus none of those on Switch.. Now imagine how it's doing with some actual high profile game releases like Super Mario Party, Pokémon or Smash.

Also, saturation? The PS3 sold almost one million more consoles, the Wii over 6.2M and the population has grown since then. It's still a ways off from being strongly hold back by saturation.

While the PS4 is selling more software, that's only due to the bigger install base. And still with almost 4x as many consoles sold, the PS4 still only managed to sell somewhat under 2x as much software as the Switch did so far this year.

Nintendo may not be able to make a AAA game every month by themselves, I get that, but why aren't they outsourcing more projects to talented external teams to keep the flow of games up? Why aren't they buying third party exclusives or pushing harder to get multiplats? Why aren't they at least showing us stuff like Metroid Prime 4 and Bayonetta 3 so we have something to get excited about and look forward to beyond just the next 4 months?

Not intending this as a personal shot, but rather a general point: fans suck when it comes to patience.  Fans tend to be simultaneously irritated when a company or console announces a game prematurely and when it doesn't.  And an added irritant in the former case is the level of "what have you done for me lately?" that comes along because even if Nintendo was putting consistent screenshots and updates on Metroid Prime 4 and Bayonetta 3, most people would be whining that those games are old news.  Damned if you do, and damned if you don't.  I can't really say that Nintendo's current focus on games closer to release is bad, overall.

Also, I've never understood why people get so hung up on AAA.  Especially as it relates to the Switch.  AAA is not what the system was designed for (Nintendo's own top properties aside), and it is not what anyone should have ever expected.  Bethesda and Panic Button's work is a bonus, not a sign of what we should expect.  When Nintendo went blue ocean, it targeted it's own properties, AAs, the handheld market and indies.   And FWIW, that's the same rough line-up that saw the 7th generation DS and PSP sell nearly a quarter billion units.  Or, more realistically, has their 8th generation counterparts at a combined 90 million.

As far as keeping the flow of games up, Nintendo has published at least nine titles that have shipped over a million units in the 2018 calendar year: BOTW, SMO, MK8, Splatoon 2, Kirby, Mario Tennis, DKTF, Labo and Octopath.  No, we're not talking about God of War level sales (until Pokemon and Smash drop), but it is honestly impossible to argue that Nintendo hasn't actually kept the flow of games up.  The fact that it already has a healthy lineup of new and evergreen titles pushing sales is actually impressive.

Would you rather not even know Prime 4 was a thing up to this day? Maybe. But most people wouldn't. This is a game people have been asking for for ages, in a much beloved franchise that was quite tarnished by the two games we don't speak of. Nintendo's announcement was basically just to appease those people: "hey guys, here it is, we're making it", end of story. It was very obvious that it was extremely early in development and was only announced to calm fans about it - there was no CG trailer, no music, no concept art, no nothing besides a quickly put together video showcasing a quickly put together logo of Metroid Prime with a wacky 4 next to it. Announcing Metroid Prime 4 in the way they did was, regardless of your opinion on it, the right move - it appeased fans, and by not showing even the slightest hint of what the game could be like, it also serves as a soft announcement that won't leave people counting the days in excitement (which isn't a good thing if your game is over 2 years away from completion).

Edit: also, announcing Prime 4 back at E3 last year was almost a necessity, because of how bad it would have looked otherwise for Metroid, with only Samus Returns being announced. As good as that game was, it would have left a lot of insecurity over the future of the franchise when the only game announced for it is a low-budget 3DS remake, while other franchises get massive new games such as Breath of the Wild and Super Mario Odyssey.