They are for my office. Needed a lot more power so I went to i7 with 32 gig ram and high end vid card for autocad and photoshop.
Actually windows 10, if set up properly, is better than 7 and it only takes a short time to figure your way around.
Some minus' are getting the permissions to edit certain files on the os which I am working on.
If you went and actually paid for windows 10 and you have used windows 7 I won't bother to argue your opinion on which is better. I will stick to an operating system that has been around a while though, myself, as it suits my meager purposes.
Did you go prebuilt? What vid card? did you consider dual vid card setups? what motherboard did you end up with? what type of i7? Do you have one of the new 6th gens?
I only have a modest set-up myself but I chose the components and the box and built it for around a grand last year, (still managed to blow my GPU but I have a much more powerful one in now and it runs fine).
A lot of businesses are/were having problems with windows 10, heard from them myself. So even after I found out how to shut off windows 10 "securty holes" I chose windows 7 and only had to tweek it a bit. A lot of software wasn't compatable with windows 10, at that time anyway, and people were pissed when they upgraded their operating system and their business software wouldn't run on it (real estate, insurance and government offices, that is including schools, were affected). Working on the help desk for microsoft must be considered "job security" type of employment. I would love to have a few drinks with one of those guys after working hours and hear how they really feel.
Remember that microsoft is a business, they are in it for the dollar. But I am old school and I don't sell quite so easily. Every year car makers come out with new model cars and sure, they make some improvements but I get around just fine in an older model. A better example is aspirin. Go to any pharamcy and you will see multiple brands....all selling the exact same thing...at different prices. Aspirin is aspirin bro, you can buffer it so it digests a little easier but there is no real difference no matter how you spin it. An Operating System that serves its' purpose is one that works. Until you have the need for software that just won't run on what you have installed, the time to change your OS likely has not come yet.