> These are not useful applications, we just like them because of nostalgia.
On the contrary; I have Paint.net and GIMP installed, I've experimented with both of them, and I still don't have a tool as quick and easy for marking up a screenshot as Paint is. At that singular task it is superb.
I create a lot of training material, so marking up screenshots is a significant component of my job. This will make my job harder for no good reason.