It's by the team that did Horizon EDA, which is very much a "craftsmanship-first" effort. and they've been working on this for some time now. My guess is hardly any.

Is it a team really? Most commits seem to come from one user "carrotindustries". I am really interested in an Open Source CAD application with good UX, this one looks great. But I don't want to spend too much time on an application maintained mostly by a single developer. The risk of it being abandoned is too high.