You should test it out with those 33 installed as flatpak. If you end up with 4.7GB for runtimes, that's basically nothing these days as far as storage goes for that amount of programs. More you have, more you benefit from shared runtimes. I doubt it'll be less than AppImages but it's usually the starting runtime space use that shocks people.
Here someone tested it with 163 flatpaks and the runtimes used 8.7GB. With the top 5 most used runtimes covering 128 of those flatpaks.
I just checked out mine, I have 34 apps and runtimes use 3,1GB
It doesn't matter if they share if in the end they end up using several times more storage than the appimage equivalent.
Well we are talking about two gigs, after all. Unless you're using an embedded system, it's not a much of a concern if you ask me. But it is more, true
