Sanity check: What units?

It's probably on my end, but I'm working with a lot of vehicle dynamics formulas and they're pretty much all in metric system. I don't mind working in other units, but just as a sanity check, can someone tell me what unit certain functions return. 

The main one I'm curious about is: GetVelocityAtPoint. Does it return it in inches?

Source: https://developer.valvesoftware.com/wiki/Unit

It's all inches at the moment. We do need to have a serious discussion about it, and I wish we made the change earlier.

@AleD yeah I saw those but I wanted a sanity check since S&Box has changed the physics engine ( from what I understand ).

@garry thanks, yeah I can imagine it might be a pain to change. Good luck!

What about Rigidbody.Mass? Is it kg, pound, something else? 🤔
And NavMeshAgent.MaxSpeed is inch/per second?

Working with other units than m or cm really confuses me. 🤯