just let me play the old version of the game on the new console.
I don't think you need to buy any upgrades to play the original Switch versions on Switch 2. It's supposed to be almost 100% backwards-compatible with Switch games, with a few exceptions for games that rely on specific hardware features (like IR).
Correct me if I'm wrong, but I think the original BotW and TotK will play just fine on Switch 2 without upgrading.
Considering how poor the performance was in TotK, I really think Nintendo should have made it a free update. That's fairly common on the PlayStation side. Lots of PS4 games got free updates with PS5 optimizations, for example (and even more free updates for PS5 Pro).
I dropped TotK due partly to the performance issues. At this point I might rather play it on an emulator than buy it again for Switch 2.
Probably. Even Switch 1 uses naive upscaling a lot of the time. I don't think Nvidia makes any chip that don't support DLSS at this point.
I just hope we get decent frame rates in general. I don't want to deal with 30fps fake-4K.