I'm on Fedora where the equivalent is called Flathub/Flatpaks. There are definitely some rough edges still, but the possible upsides are amazing for me.
It makes it way easier for a developer to release for different Linux-flavors. The applications get sandboxed and there is much less risk to mess up your system. Stuff like permission, similar to Android/iOS becomes possible.
There for sure is problems to: it makes it way easier for a lazy developer to ship ancient libraries without security fixes, the "packages", now images, are much larger and the quality check of the packager gets sidestepped. And, as always when you try something new, it gets worse before it gets better.
But I think the idea is good and I hope for the best.