We have some machines on Vista at work. They'll stay that way until the hardware fails. They came with Vista, they do their job, they're isolated from the internet. Changing them is time and expense for no return.
A slight majority of a statistically worthless sample size agree.
I upgraded to Win10 at the weekend ... I reverted to Win7 at the weekend ...
My laptop comes with a Sandybridge i7 CPU/mobo with HD3000 graphics. (Also has a GT540M GPU with Optimus, but no options to turn off onboard graphics). Consequently when I run Win10 my laptop screen is not detected - at all ... I can only use an external monitor. Windows updates don't find any updated Intel HD3000 drivers (there's supposed to be a Beta driver that addresses this issue), and I can't run with only one screen, so I've gone back to 7. If this issue is ever resolved I'll maybe look to upgrade again.
Offered upgrade of Surface pro 2 went without issue along with a firmware update. No problems apart from battery life has gone down.
Upgraded main system (forced update). Update failed with too small system partition (the hidden 100mb). Fixed that and upgraded ok. Unable to send email from Outlook 2013. Did SFC and that was fixed. I do wonder how ordinary people would have fixed either of those issues. Found new version of Kaspersky only available to Win 10. No other software issues so far.