Interesting. I've been saying to folks, "If you liked 8, you should love 10". :-)
Clearly, such things are very much a matter of individual taste.
The point being, that with the tiles turned off, which is the default, there is absolutely no difference between win10 and win 7, except for a much faster, snappy interface. Edge seems to need perhaps a bit of work regarding some ad heavy websites but I almost always use Firefox with adblocker.
My desktop remained as it was, I seem to have a better computer as far as syncing data on my network, and it still has windows explorer.
I also appears to use less memory, about 10% or so less. At least on my box it does..
Cortana seems to work fine and you can integrate it with the browser. You can also turn on speech and speech to text if you like that sort of thing to make Cortana seem like siri..
But frankly speaking, it looks and feels like a better win 7 machine. I never jumped at win 8...I tried the beta and I hated it. But win 7 was becoming top heavy with hundreds of updates and was not performing well anymore.
If you like, (which is what I did) you can image your current “C” drive, (I prefer DVD’s) and then load 10.....use it for a couple days and check it out...If you don’t like it there is a provision to roll it back, but I just used my image to make sure everything returned to the way it was. I had install issues initially, which turned out to be a third party driver issue. Now fixed.
But I never had any issues with my 64bit laptop...win 10 improved it dramatically. I loaded it the first day it became available..no issues noted..