Stable update.
My concern is more with beginners creating a new project and adding an unsupported 3rd party plugin to it, wondering why it's broken. I feel like it might be a good idea to have a flag or something similar inside the addon SDK, that indicates that worker mode is supported.
This could for example be used to display a warning message, that selected 3rd party plugins might not support worker mode.
I'd rather require addons are compatible than let addon developers get away with making ones which are broken with certain settings.