Yeah, I used freecad to fix up a screwy stp model for one of the parts, it was confusing but sufficient for that for sure. Weird how hard it was to move a solid body to the origin though.

If you meant in the other direction (and bidirectional) that looks good enough that I'd use it instead of Fusion in the I guess two situations it would come up -- creating a PCB outline from a larger model, or moving parts on the PCB to avoid interferences and have it show up in the layout software. Fusion 360 does do both of those.

Easy is to just export stp from KiCAD which works great for most situations but I hope this tool gets added to the kicad startup window soon.

We're already up to a schematic editor, layout editor, library editors, the best gerber viewer I know of (I have my coworkers install kicad just for the gerber viewer that I know is just gerbview but they use windows so this is way easier), and the calculator tool is amazing for calculating stripline impedances and RF attenuation and so on. A 3D tool that interfaces with the layout tool makes perfect sense to add.

edit: As an option and a standalone program with an interface rather than a unitary blob like Fusion ;-)