There are big wishes for Signal to adopt the perfectly working Flatpak.
This will make Signal show up in the verified subsection of Flathub, it will improve trust, allow a central place for bug reports and support and ease maintenance.
Flatpak works on pretty much all Distros, including the ones covered by their current “Linux = Ubuntu” .deb repo.
To make a good decision, we need to have some statistics about who uses which package.
Laziness is a very negative way of putting it. Another would be prioritisation - with limited budget, what is the best way to get as many people as possible to have their communications encrypted?
They could dump their existing code that let users SMS non-Signal users and upgrade it automatically to E2EE if the other number has Signal. Oh wait, that would worth adoption, nevermind.
That would’ve been great to keep, and the Signal team thinks so too, but they were kinda forced to remove it by Google: https://community.signalusers.org/t/signal-blog-removing-sms-support-from-signal-android-very-soon/47954/57