> A startup may be all-Mac. Eventually if it's successful though, it'll be too big to use 'consumer' tools only... likewise they have no realistic counterpart for Active Directory, nor business email or collaboration (at least Google has that though).
Between the two, they have those needs pretty much completely covered (also, Apple does have good support for MDM now). To me this reads more as a complaint that neither of them is trying to execute the same bundling/business model as Microsoft, or selling the same kind of security model as what makes sense for an old school IT shop that literally could never leave Microsoft products if it even wanted to.
Every single mobile device in "Enterprise" is using MDM provided and supported by those two companies for business users at multiple layers of the stack required to provide that functionality, they just don't make a business out of selling it directly as a Serious Enterprise Product to IT departments (the least important one, ie where a guy in a collared shirt with a web UI takes a middle manager out for a steak dinner).
Contrast that with a decade ago. All systems accessed via networked PCs using Windows native clients. I had to use RDP to a desktop to access anything from outside the network.
One day someone is going to realise that the organisation does not have to spend £££ replacing every PC just to keep running a Web browser.