I guess there's a kind of double meaning of "responsible" at work here. I didn't mean to suggest MS was wrongful in their actions - what they did they did for

I guess there's a kind of double meaning of "responsible" at work here. I didn't mean to suggest MS was wrongful in their actions - what they did they did for their own purely business oriented reasons and it worked well for them. It just happened that it resulted in a perception that there is an invisible line between an OS and its apps that an OS vendor won't cross and that if you establish a business on one side of the line you can trust that the OS vendor won't squash you. That line was never real, it just happened that Microsoft couldn't cross it for business & regulatory reasons, so they didn't. But now we come to MacOS and iOS and Apple has no qualms about crossing the line but developers still seem to expect them not to. I attribute that partly to this historical perception that came from the MS era.