In terms of "capabilities that could exist" - I honestly have no idea what you are talking about! I use iOS and Mac because it has _more capabilities_ than anything from the FOSS arena. Last time an "open source competitor" to airdrop came around here it was hilariously unusable!

There are undeniable advantages to vertical integration. The miracle of apple bluetooth headphones is a stark example. The enhanced pairing/hand off that airpods have is insanely superior to the stock standard. Even iMessage has superior default encryption than anything short of Signal (maybe).

Alas the "product vision" of community developers is rather short sighted and stymied by lack of hardware manufacturing capability. Linux on the desktop is barely usable, so I really wouldn't get too excited about the product vision.

There's a lot to be said about Linux and such, but the idea that Apple/Google/etc are limiting innovation is just not based in reality!