[imtringued]

Or the usual "has already been done" comment on a Show HN. Add "written in Rust" and you are guaranteed to disturb a beehive.

It's a lot of fun to build something yourself. It's not very fun to spend days wading through an old opensource code base only to get told that your change won't be merged. The only people who go through that process are those that absolutely need the patch.

The thought of contributing to Freecad hasn't crossed my mind because of that.

Meanwhile some people swim against the stream and create something beautiful. Just take a look at Kicad vs Horizon EDA. The world is better off by having both.