The big advantage IMO is that it will be an active OS for many more years.

The down side is if you have an older computer it may have driver issues trying to install. I was still under support when I did mine and they had to drop the Dell network card driver and put in a manufactures driver.

I like the Win 10 OS better then 8.1 but I still liked the Win7 OS too.

One big complain I have with win10 is how it handles music. You can no longer see the meta data info. Had to download a 3rd party app and it kinda sucks.