I am following this thread with an all-consuming passion, and am incredibly excited by the ideas that are being presented. My own programming ability is limited to VBA (Excel) and (remotely) Foxpro, so I can't say I really understand the development issues of QT (which I understand D|S is written in) vs GTK (The GIMP?)... but since I'm a heavy user of the GIMP and Blender3D and Ubuntu Linux and an avid advocate of the Open Source movement, I applaud the insistence on at least dual OS development... and the underlying philosophy driving this.

I run WindowsXP at this point almost exclusively for Poser 7 - I did try to run Poser in WINE, but the interface issues became too irritating, so I went back to WinXP for Poser. I never get on the Internet in Windows, and do everything non-Poser in Linux. The people at Silo are seeing the handwriting on the wall and are creating a Linux version. This will be the first - and by your proposed ideas - the most comprehensive posing/modeling?/animation/rendering application for any OS out there, and the only one of its kind for Linux. You have my undying, enthusiastic support, RD! If there is anything I can do to help.... I'm here!

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks