Yeah nothing about Apple is server side and imho that's what training is. To be serious about it as a company you have all sorts of other tools (crawlers, etc...) helping with training so it basically has to be in the datacenter at any reasonable scale anyway. And that's just not where Apple lives. We saw with Swift that they couldn't focus on server side enough to make it a serious language there and they've consistently declined to enter that area over the years because it's outside their wheelhouse.