I usually just "Open with AppImageInstaller" when I download them, it pops up and asks if you want to run once or integrate. When you get a new version you can right-click the old one's shortcut/icon and AppImageInstaller's integration give you a "remove from system" type option.
I use Cura as an AppImage, FreeCAD, Lens (Kubernetes "IDE") Zettlr, and a few others as AppImages. It's really clean and convenient.
It really upsets me when I find tools I want only have snaps, because like any sane person, I kill snapd the second I install an Ubuntu system (Laptops) and I run Manjaro on my desktop so snapd isn't going anywhere near it.
While I can't see when the original blog post was submitted, I know this forum post was posted 2 hours ago. Are you sure you would benefit from updating even faster?
EDIT: In any case, you could use the AUR package that points directly to the git repo.
I doubt it.
> My experience with repo/package models suggests it very much would not.
The Nix package manager would. However, I have no idea if their packages are kept up-to-date like that.
My cursory search on the interweb did not yield any promising results on the Arch wiki either. Happy to be corrected, of course.