Gnome will die the second Cosmic (Epoch) DE gets remotely close to 1:1 parity. It will be more stable, it'll be more feature complete & support modern features, it'll have a similar level of polish, a similar yet way more flexible design language and the devs will actively work with the Linux ecosystem & so on.
At that point the only people left over for Gnome, are those stuck on x11, and die hard shills/fanboys. Many developers are very much sick of Gnomes shit already and only put up with it because it's popular.