I've been using XFCE for about a decade, after switching from Gnome. As a developer I have lots of windows scattered across multiple screens, and find a taskbar the most convenient way to manage them. Gnome 3 went a different way which didn't work for me.
XFCE worked very well, getting out of the way and letting me be productive. The apps like file managers, window managers, image viewers, etc are all fine, and you can run any others anyway.
But I've been wanting to experience Wayland for a while, and XFCE aren't there yet. It is a lot of work for the volunteers.
So I've switched to KDE for the next decade. Everything is Wayland. The default apps are busier.
Thank you XFCE for the last decade.