Is it even worth it collecting ps5 games?

[Zippy6]

Well the PS5 has been hacked on lower firmwares and it's quite possible that it'll be hacked on later firmwares in the next 10-20 years before the longevity becomes an issue.

I can feasibly see a CFW being modded to boot from the replaceable M2 slot SSD instead in case of widespread internal SSD failure.

Specialist repair shops will probably be able to desolder and solder on a new SSD anyway.

I don't see much reason to expect PS5 consoles to have a much shorter working lifespan than PS4 or PS3. It's going to be a long time before you can't find a working PS5.