I just installed macOS Sierra and have up-to-date iOS 10.1. I still cannot get handoff working. From reading the reports this is not just me. At least Chrome still syncs.

Similar experience here. I use iPhone, MBP and iPad. Originally thought that having everything under one umbrella would be a huge help, but the reality is the syncing is such a pain that I never do it. Took me many, many months to even get AirDrop working between my own devices. iTunes is very frustrating to use in managing iOS devices.

one of the things that apple didn't pointed out is that there are 2 versions of airdrop. i didn't know this and had an older version of osx that wouldn't sync with my iphone. no error message either.

"Every corporate office in the world is running Windows."

While many companies do use Windows, many others do not, including some very large ones. You think they are using Windows at Apple? That's the world's most valuable company and they have 70000 employees. What about Google? It's another huge company with tens of thousands of employees and you have to beg for permission to run Windows there, and very few do so.

I think Windows has a lock on mid-sized businesses that are large enough to have serious information management challenges, but aren't big enough to solve them. Outside of that zone it is by no means universal.

"Outside of that zone it is by no means universal."

I'd say that outside of your two examples, you'd be hard-pressed to find a Fortune 500 company that doesn't have >90% of its corporate fleet (not servers) being Windows boxes.