Between SD cards and M.2 drive upgrades being pretty painless, you can start small and upgrade.

I think it just depends on the games you play. Check to see how much space they'll use. Personally, I don't play a lot of "AAA" type games, I play more indie games, so 256GB has more than enough space for me. You can always upgrade the SSD or use a microSD card.

Space 100% comes down to the games you expect to play.

Also the 256 GB model isn't the new OLED model being highlighted by this post. You can still get the now-discontinued LCD 512 GB model at a discount if you're concerned about space and don't care about OLED.

I somehow managed to nearly max out my 512GB deck and 512GB microsd card. I was surprised to see storing stuff on the SD card had negligible impact on speed.

It really depends on the games you play though and size of your library.

Depends on what you do, play, consider doing. I'm using it as my PC and love more storage. Once I finally buy a NAS I would care less.

256G+512G SD card and both are around 90% full.