I went ahead and upgraded at the time. My only real niggle was it mucked up the power settings on my Acer laptop. Kept resetting the display brightness to zero when turning on on battery. This meant dragging out the power cables to bring screen to life so I could reset it. Now fixed. Other little thing is that it removed the "Lock" screen. Handy if needing to be away from the laptop for a minute or two.
Apart from that it does boot up faster though I try to keep the comp running pretty bare bones and not clog up the memory which helps. There was a lot of trawling through turning off sharing software and plugging security leeks, most modern machines love the idea of "The Cloud" which I don't; I know it has uses but I don't want them.
On the whole I'd say it's a pretty smooth transition. All my non Microsoft programs seem to be running fine, I was worried about things like Libre Office not running as I don't want to be paying an annual fee for Microsofts which I feel is a rip off.
No longer use my printer or scanner so don't know about drivers for those. But all the other peripherals I use, cameras, memory storage, MP3's, Kindles and the likes run nicely still.
Sent via smoke-signal from a woodland in Scotland.