I'm probably in danger of sounding like a stuck vinyl LP about this subject, but . . .
(These folks are considerably more kindly towards 10 than, say,
InfoWorld columnists.)
Also there is this, which I excerpt from another forum posting, written by a longtime PC repair tech:
"I'm seeing roughly 2 or 3 of 10 updates to Win 10 failing catastrophically, resulting in a non-functioning system and/or loss of user files on a return to the previous OS. 10 does seem to be slightly better than 8, though 8 sucks tremendously. I recommend sticking with 7 for the time being."
From: flash
To: xywrite@xxxxxxxxxxxxx
Sent: Thursday, January 7, 2016 7:00 AM
Subject: Re: Windows 10 considerations