> I guess they will just swap on the fast ssd so it will be alright

but that should cause extra wear on the SSD, or is this no longer a concern?

Certainly but I'd guess the problem won't manifest for years and other showstopping pieces might fail before then. That old frankenstein macbook of mine had the same 850 evo ssd I shoved in it for like 8 years of use and abuse, always high temps with that macbook too. People say you shouldn't use an ssd like that but oh well, it seems to work alright.

There wouldn't be so many people who see no need to upgrade their M1 series computers if this were a real concern.