To further your point, I would add Mixer. Msoft gave up on it just months before Twitch made a series of controversial moves that would have been the perfect moment to strike with an alternative.
I think that part of the difference there is also that Apple is really good at marketing their products into "the cool thing to have" and a status symbol, a lot of their products don't necessarily gain steam based purely on their functionality but more based on their ability to make it the hottest latest thing to have.