The full title on close parsing doesn’t make sense in xorg context. But “X kills its <unix os> app” initially had my brain trying to figure out what people were running X on mac.
Haven’t done it in ages but I used to run xquartz on a macbook and do x window forwarding from my desktop. It worked surprisingly well, even on remote sessions via an ssh tunnel.
I don’t have much reason to do it nowadays because laptops are so much more powerful and storage is so cheap that the stuff I was doing can all be done locally.