Browser Development • Re: Linux Pale Moon with Qt toolkit

Gimp took over 8 years from 2012 to 2020 to transition from gtk2 to gtk3, and has discussed eventually moving to gtk4 but it will be challenging and they haven't started. As long as gimp is on gtk3 it will be maintained and the distros will have to package it, as gimp is an essential desktop productivity application.

Seems like you could just follow the future path of gimp on desktop GNU/Linux and be relatively safe.

Well, actually... GTK2 support ended in 2020. GIMP kind of hurried to move from GTK2 to GTK3 because of that. So it's not so much that they knew where the safe path was, they just were able to do a port to GTK3 relatively quickly when they heard GTK2 wouldn't get security updates anymore.