I think they are wondering if one extension can use both v2 and v3 APIs at once? As in whether v3 APIs will be “backported” to allow v2 extensions to use them

I’m using an app to use my Android phone as a webcam, which works great (good low light performance!) provided I can stand it up somewhere above my laptop screen (finicky). You can accidentally knock it over. Might be worth considering if you don’t use the camera much - otherwise an external one will probably attach better and he more stable