[WillAdams]

Why this rather than Motion Mountain?

https://www.motionmountain.net/

[alok-g]

Pointing to someone else's comments that advised against it:

https://news.ycombinator.com/item?id=37201037

[WillAdams]

Thanks!

I no longer regret that it has not yet made it to the top of my TBR stack (and is being removed instead).