I built myself 3 ITX machines, one Intel, 2 x AMD, all running Win7 Pro 64 bit, Boot times are 28 seconds, 33 seconds and 34 seconds.........
Microsoft support for W7 Pro until 2020, so plenty of life in it yet.
Have no need for pawing at my screen, and Win 7 does everything I want. I had W10 right from developers build, just did not find it intuitive so gave away the machine with it installed.
Win7 is the best desktop OS Microsoft made, Win 10 is a hybrid trying to be all things to be inclusive for tablets, phones etc and I find this hinders rather than helps.