Re: Tech enthusiast, not necessarily IT.
I can't speak for everyone, but I know I tried both the Win8 and Win10 betas and just decided it's not for me. The backend improvements are just too minor compared to the disappointment I feel about the new UI and apps.
I still want a categorized start menu (even if I have to do it myself) and less useless chrome on the windows (translucency makes the problem much less noticeable, apps that waste space make it more so.) And their choice of UI colors make my eyes bleed. I assume MS will address some of the problems with slow and crashing apps though.