> Does multi-monitor mixed-DPI work in Gnome?Not by default. I had to hack a script by mixing xrandr scaling and Gnome scaling settings, which works, with some caveats I haven't figured out yet[1].
The reason I stick to Gnome is that plug-and-play works like a charm, remembering my settings with various monitors.
> I restart perhaps every six months due to some problem that could be KDE; I find it very reliable both at home and at work. Granted, both machines are desktops, I use a laptop so rarely that I usually shut it down after use.
Most crashes came from laptop-related actions: monitor hot plugging, closing the lid while being awake, waking up with another monitor plugged in, etc.
> I use focus-follows-mouse, which is incompatible with a titlebar outside the relevant window.
What I meant by "titlebar integration" was when the applications themselves draw UI on the titlebar like in Nautilus or Tilix for instance[2].
The "menu in top bar" feature can be deactivated, so I think you could use Gnome.
[1]: 1. The Gnome UI (dock and topbar) are huge, which isn't much of a problem for me since they are on a smaller monitor.
2. Some applications don't scale properly and are either too zoomed in or out.
[2]: https://gnunn1.github.io/tilix-web/src/images/gallery/tilix-..., https://wiki.gnome.org/Apps/Files?action=AttachFile&do=get&t...