I'm sad we don't have an open-source alternative to these. Something like Blender but for UX design. Surely it's nice to have a backing of a private company but they seem to switch every few years. Before Figma, Sketch was the big thing. Probably in a few years something else will come up and require us to convert to that. An open-source alternative would perhaps make it more easy to adapt and change based on the community's necessities?