While I don’t think flatpak shouldn’t replace traditional packages, I still like it.
Flatpak apps just work most of the time, they work without issues and are often very up to date. The sandboxing does have benefits because no apps interfere with it, the problem is that it doesn’t work super well with other apps, sometimes the theming is off, and it doesn’t work well with other apps, installing apps takes much longer, and it isn’t as easily started from the command line.
Edit: typo
but for the price…