Excellent question. That's what I found regarding it: https://github.com/flatpak/flatpak/i...ment-356259401

So, in practice:

- if you have KDE platform with Qt 5.12 installed in home (--user)
- all apps using this platform will share Qt libs and all libs in the platform
- the libs bundled with the apps (like some ones required for specific action by that app) will not be shared between apps

In this respect, it the same for us now. All libs bundled with the apps don't share RAM even if they are the same.

So, we get an overhead of loading platform libs to RAM, but we can minimize it by using the same runtime as much as we can.

However, the discussion in that linked issue is interesting for getting info on Flatpak internals.