From a very quick and simple test it seems that i can move an object and still have stable physics at around 4 194 km from 0! - giving us a solid 8 000 km cube of playable space
But right after that point the objects just dissapear when clicking Play.
Rendering is also not completely fine still at that distance but that was never the problem as client side you could just use origin shifting for visuals.
The current new limit is a very big improvement in comparison to what was possible before but honestly i was thinking they could squeeze out even more than that since the jump to double precision is quite a big one.
Maybe they can improve even more with time but I’m not complaining, this is still a huge win.