Just wanted to point out that the debs are gone, replaced by a simple binary installer that's click-to-run simple. This is a better cross-distro solution than debs/rpms/etc!
If the client has
self-updating features in it, then you don't really need to have this be
run in other ways. At this point, the only missing features are
sandboxing of the installer itself, and having a nicer way to uninstall
it via the system's uninstaller. This could all be accomplished with
flatpak if flatpak even sandboxed things by default. At least on Linux
Mint, flatpak sandboxing isn't enabled by default, or at least it's not
very restrictive if it is!