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... :)
I just get a headache tbh
why?
it is effectively a keyboard driven GUI. you potentially get the full power of the commandline to do your actions without giving up a graphical view of your system.
i wrote in my own comment that i want to go even further and integrate a full terminal: https://news.ycombinator.com/item?id=47801068
ttyphoon on the other hand is a terminal project that approaches this from the other side, getting even more graphics and structured data support into the terminal: https://github.com/lmorg/ttyphoon
both have a similar goal: get away from the old limitations that terminals have but keep the power they offer.