I'm thinking that up until 2023 or so, support will either increase, or stay as is. However, I doubt it's gonna drop off before then. Since every AAA game released for the PS4 Pro and Xbox One X has to run on the base models, it won't depend on when the next gen consoles release, but when support ends for the current gen ones. Devs supported the PS3 and 360 for a couple years after the PS4 and Xbox One released due to the install base, so we're probably gonna be getting current gen games until around 2023, which will have to be cut down to Switch power as usual. After that is when things will get sketchy, unless the install base is crazy high.
2387 posts since 06/02/10
I can see Nintendo making an upgraded Switch to boost performance while still playing Switch games, I mean aside from the fact that they have done it in nearly every handheld generation themselves, MS and Sony bother did the same with the Pro and X.
Time will tell but so far the Switch is poised to devour Japan as the top console, so outside of a few developers most Japanese content will land there and securing domestic strength at home is one of Nintendo's usual focuses.