IMHO companies should include older designs, or allow people to adjust everything. So Windows 10, for instance, could come with the designs of 10, 8 and 7.
As far as I can tell, Windows 10 doesn't natively allow you to use the older window decoration styles—you'd have to purchase 3rd party software to do so.
That was a snarky dig at how Windows still has different styles and paradigms from different eras in different places. Menu bars, tool bars, control panels, and so on.