MS sells cloud services. They don't really care what machine you use, as long as you live on Azure as much as possible. That's why they give you more and more tools that improve the "remote development" experience.

Apple sells silicon. They don't really care about developers; as long as they can pull enough users through the iPhone->iPad->Mac funnel, they have done their job of selling as much hardware as they can. In their view, developers bitch and moan but in the end will have to go where users go - at which point, Apple can tax them for access to the walled garden.