Enterprise deployment setups have a lot of their own flavour. However the ownership is on dedicated IT dept to keep the apps updated on your system and rest of the fleet.
Microsoft has the network to train, enable and get IT to administer these kind changes. They are after all able to get windows patches in fairly regularly at higher frequency than ever before in windows 10.
Sure there were will be some small minority like still active XP users , you sell extended support or whatever to either enable them or you can stop support.