DX12U, more updates, iTunes (for some fucking reason), some games. People asked the same question about W10 when it first came out compared to 7 and most software straight up abandoned 7 today. So in around a year or so, software will start dropping 10. People are now starting to drop support for 10240 (10 RTM)
DX12U and apparently DirectStorage seem to be completely supported in Windows 10 now that I look.
More updates goes out the window once you start modding.
iTunes shouldn't need 11, and if it does, just don't buy an iPhone lol.
What games?
There is no major core difference between 10 or 11 that makes 11 more appealing over 10.
I'm curious about Server 2022 though. It seems to be a newer base than 10 being a 2xxxx build number, while having the 10 GUI and same requirements as 10.