@porkins regarding music streaming...idk I download flac off Usenet....
As far as video editing there are two that people use, davinci resolve, which is proprietary, and kdenlive which is FOSS.
As far as cad, your only good options are blender and freecad. Blender is mesh modeling, but I've been able to do precise mechanical stuff with a few addons. As far as freecad goes...idk I haven't used it.
@WldFyre @CCatMan
Each user is roughly $200/year for Facebook Iirc.