I'll jump on to 10, I love 8.1 and would never go back to 7.
You can get rid of the stuff you don't like on 8 so I can't see them not giving you the option on 10 for the start menu. If MS don't do it i'm sure there will be a program that changes the start menu so you can or just gets rid of that part of it.
I haven't used the start menu since Windows 2000 anyway so it doesn't bother me either way.