Wow, thats great feedback, let me write all that down! I'll tell you this already, desktop version is on the roadmap, we will probably produce an electron-based "native" app that can "install". We kind of like the idea of having the best of both worlds. That's also the beauty of open source, what's the risk really? Feel free to go to https://github.com/penpot/penpot and elaborate on those topics! Thank you!
Oh right, it's open source. Wanted to ask if you use any engines for the layouting part, but I can just check. See, I'm so used to all these tools being closed source I forgot I can open up an issue. I'll get to it after exploring a bit more. Hope the electron app can sustain performance!