In terms of wall clock time, on my system, it costs nothing. I can start a "Hello World" application based on Qt or GTK, and the window is there while I'm still releasing the Enter key. Technically, sure, a lot of things happen... But it's not happening on a P-90 anymore... :) BTW: My machine wasn't particularly strong or expensive either, when I bought it 6 years ago. ;)

When I read (in your other reply) that you are trying "soften the boundaries between workflows and bring some features of of workflow into another", well, that probably sounds nice... I just get a headache tbh...

I'm sure it was fun and a big achievement to implement that. And there obviously is a fan-base for that. So where am I... :)