Alternative to Flatpak and to the counterless adhoc Repositories, what's the most reliable source for getting apps installed under Debian?
I, for one, welcome our Debian overlords, taking care of stupid users such as myself to protect them from both "arbitrary" applications and from non-obsolete versions of non-arbitrary applications.
And yes-yes, this curated walled-off garden is fine, unlike all others walled-off gardens, because its maintained by "the community" (of Debian maintainers, that is).
You can also design your own simplified Flatpak-style sandboxing for it using nixpak. There’s other approaches but it’s easy. https://github.com/nixpak/nixpak