I wasted some time recently debugging why a rig wasn’t playing back an old animation properly anymore, and it was because some parts of the model were anchored.
There is a validation for the animation editor that reports if the model is anchored. However, this validation only seems to fire if absolutely everything is anchored, which does not fulfill its purpose. It is arguably useless in this current state.
When there are multiple anchored parts, this causes issues that appear to break the rig even after closing the animation editor until the parts are unanchored, which has wasted a ton of my time debugging issues that don’t exist in the recent past.
Expected behavior
Instead, this validation should show a non-blocking warning if there is more than one part in the model that is anchored, and report them. There will most often only be only one root part, which is anchored. All other cases are exceptional, but should simply warn the user and not block the tool.