I have no issues with Qed despite working on quite large projects. However, my CT6x installation had weird issues related to cut & paste despite using the same settings as the one on my Hades (clipboard contents got screwed up and/or made applications crash).
Hey Peter, didn't you say on Atari Forum your Atari setup is nice & reliable? ;-) This is exactly what I meant there, of course you can develop large projects on Atari nicely but there's no single chance to have clipboard screwed up in this way on Windows, Linux, whatever modern and maintained...