That would indeed be the easiest solution yet the problem is they're all still used to a degree as I have a big game library for each and the PS2 has to do double duty for the PS1 titles too.
Due to worklife and other stuff I also still have a huge backlog of games I bought but so far never could even start to play as well.
Well, depending on how big the PS5 is I may be able to cram it into the same shelf part the SNES is as that one is smaller and gets mainly used only when certain people visit to play stuff like the original old Mario Kart from the 90's.
It's also somewhat interesting that of all those consoles I own, the SNES (oldest) and PS4 (newest) are the ones to still run the smoothest.
The PS2 sometimes has problems reading a disc and the PS3 seems to be the one most prone to technical failures.