I have had only one issue
My 2012 vintage Asus Zenbook had a touchpad driver issue that was quickly solved with an update. I have been running W10 since the CTP's in late 2014. It is definitively the best windows release ever, and the only release that has a reliable upgrade in place percentage. No guarantee, but the vast majority will fully update with all your apps ready to use. My 2008 vintage I7 Quad desktop with an ancient bios was cheerfully upgraded and has been running thru probably 50 update builds in the Insider fast loop.
What kind of geek would leave all this to the day before the gimme license expired....
Biting the hand that feeds IT
