From i read that not "plugin"/module problem but library problem , difference is a lot. It's okay to depend on propietary library but not ok for propietary "plugin"/module.
Apple also doing this for their fork of CrossOver's Wine GPL called Game Porting Toolkit, composed by Wine + propietary D3DMetal DirectX library
are you referring to the exception for proprietary libraries that are part of the operating system? an exception that is needed because otherwise it would be impossible to build GPL software for non-free operating systems.
wine is under the LGPL which allows linking to any non-free libraries as long as those libraries are available in a form that allows relinking to a changed version of the application.
Apple also doing this for their fork of CrossOver's Wine GPL called Game Porting Toolkit, composed by Wine + propietary D3DMetal DirectX library