There is nothing wrong with GTK3. Clearly we have been using it for a long time just fine. I mention it because gtk3 came out in 2011. Which means it took the x

There is nothing wrong with GTK3. Clearly we have been using it for a long time just fine. I mention it because gtk3 came out in 2011. Which means it took the xfce team 9 years to perform a migration which still isn't complete yet. Now I don't want to shit on the work of the xfce team because they work on this on their free time and provide us alternative options and ask nothing in return, but its a data point showing why one would preference Gnome over XFCE. The Gnome team has a lot of resources behind it to just get things done and push new technology out faster than the rest.