To cut to the chase, Flatpak is nice to have, but isn’t a complete replacement, and the other suggested “replacement”, Pacstall, targets Ubuntu instead of base Debian. If you want more detail, read the spoiler:
spoiler
I use EndeavourOS as my daily driver, so I’m used to the sheer convenience of the AUR. However, I’m not a fan of how that convenience is tied to a continually-changing rolling release distro. This becomes especially apparent whenever a major KDE update comes out, or the Arch Linux people decide to make yet another big change.
Debian is the other main distro I use. I mostly install it on systems I don’t intend to use often, but recently I started dual-booting it on my main desktop. I like how slowly things change in the Debian world, and if it were easier to run uncommon software on it, I’d probably use it more.
I know Debian can use Flatpak, and while it is nice to have, it’s not a complete replacement for the AUR. The other “replacement” MPR/Makedeb’s developer suggested is Pacstall, but that’s for Ubuntu and not base Debian. If Ubuntu were the same distro it were back when 20.04 came out, I wouldn’t be opposed to using it, but Ubuntu’s gone to shit since then.
EDIT: Inb4 Distrobox too.
Yes I hate the snap for everything stuff.
Regarding security updates, are the missing ones critical? I have been ignoring ubuntu one.
They added an option for enterprise to extend security patches support for unsupported old distros, and then gave it free to users too behind a pro account. But you don’t need it unless you’re on a very old version of ubuntu.
I guess other thing Ubuntu One provides is kernal hot patching which I do not care about.
I think Debian has a similar option though provided by a third party.
I’m not sure tbh, but the idea of locking any security updates behind One irritates me.