Also they could support fat while not having the main system storage using fat.
Microsoft managed to make their patent encumbered exFAT file system a required part of the SDXC card spec, just as their much-abused patents on FAT32 were expiring.
I guess it is gracious of them to partially undo the damage they've done, now that they have given up on Windows Phone.
Microsoft hasn't charged consumers for upgrades to Windows for years - and surely that is because they expect to profit from advertising.
The same can pretty much be said for Windows Pro and small businesses. Why is there no subscription to Windows? Why can't I pay to get 3 more years of security fixes for Windows 7 however an enterprise can?
Business as usual.