I encountered a small problem.
If there is no Rigid Body World created there is something like a 45 line error in console while changing modes with an armature selected. Creating the rigid world fixes the error.
Also if you get the previous error and delete that armature there is a new error that says it’s impossible to find the armature and the addon doesn’t let you activate the bones anymore.
Traceback (most recent call last):
2.91\scripts\addons\Rigid Body Bones\utils.py", line 36, in update
2.91\scripts\addons\Rigid Body Bones\events.py", line 126, in next_tick
2.91\scripts\addons\Rigid Body Bones\utils.py", line 169, in select_active
RuntimeError: Error: Object 'Armature' can't be selected because it is not in View Layer 'View Layer'!
The first error is negligible so if you don’t delete any bones before activating the addon or creating a Rigid World it should be fine.
Other than that the addon works amazingly and as you said it saves a ton of time setting up rigs, since it does the heavy lifting you can even connect new constraints to rigid body ends and make puppet like animations. Thanks again!