I don't understand why many people find it hard to believe that Nintendo will release patches to improve the performance of their games already released on the Switch. Iwata's statements in the Wii U era have already been debated about how he wanted Nintendo to focus on developing for one platform rather than for a specific piece of hardware. Well, at the expense of knowing about the plans for the Switch Pro and if Nintendo will keep following Iwata's plan to launch iterative successors like smartphones, I think it is already quite evident that "Nintendo Switch" (with the nvidia architectures, technology and tools) is the "platform" (their iOS/android) for which they are developing now and they will develop their future games.
I think that's why they are putting too much efforts and taking too much time into releasing their old games to the Switch. They already have ways to emulate games from NES, SNES, N64, NGC and Wii to the Nintendo Switch, they re-released likely all the big games from Wii U and I'm pretty sure they will do the same with portable devices, heck! I don't know if I'm too optimistic but I have a theory that Miitopia has been an experiment in how to port Nintendo 3DS games to Nintendo Switch, to keep re-releasing old games to fill the release calendar gaps and solve their game shortages but this time from the 3DS era.
If Nintendo is putting all this effort to make most of their games available on a single platform that will be running in all their future devices, what makes you think that Nintendo won't do the same with its current games? Most of their first party Switch catalogue will be updated, adding DLSS would be the obvious choose to be future proofing for the Switch 2, 3, 4 or whatever, so the game will "evolve" with the DLSS technology to be adapted and ready to run in future hardware in whatever crazy resolutions and framerate is the standard.
Of course those won't release day one for al their games but maybe releasing in waves to keep the interest in the Switch Pro biggest strengths and give old games their time to shine. Surely Nintendo has had enough time to plan these patches and in ways to adapt, with Nvidia, the technology in their graphics engines, I even think they could find a way to add a DLSS plug-in to the NERD emulators, I don't know, the possibilities are vast with Nvidia as a Nintendo partner.
I don't know if I'm expecting too much but I'm pretty exciting for the future. Don't let me down, Nintendo (as you always do, lmao).