Well the gadgetbridge comment is not really true.
It can’t pull activities from Strava, runkeeper, or similar or push to them. Syncing across services via APIs or Heath Connect stops it from really being a proprietary watch software replacement or a google fit replacement as they all do that and it is a core function because people want to use the apps they want to use. For example, lifting tracking from Progression or similar which other apps like gadgetbridge or strava just aren’t made for. It doesn’t have the functionality built in to cover every activity set.
GPX is extremely limited and is only GPS data, not good for fitness trackers as they track all sorts of activities. TCX or FIT are better, but of course managed by Garmin. There isn’t really an open alternative standard. I guess the closest we come is the Health Connect API which is completely local interoperability.
Interesting, when I started using FreeCAD I had 0 training, and I have managed to make it work just fine. Was mostly frustrated by the topological naming problem, but that is fixed now.
You can do quite complex things with it.
You just have to put in a bit of effort and think in an additive sketch-extrude workflow. But yeah, not easy to transition from solidworks.