After using Ubuntu since Microsoft came out with Windows 8, I finally switched back to Windows 10. I see no reason to not upgrade a Windows 7 machine. Everything works just as good and Windows 7 is starting to feel a bit "old" by now.
Of the 2 machines I upgraded to Windows 10, the driver support was better with Windows 10 out of the box, then it is with Windows 7/8.1. Every application I use works just as good.
I will not miss Ubuntu either, although still the most modern feeling distro to me, it is still old skool in regards to the UI. Every new release is paired with popups of something that crashed, until a month has passed and small bugs ironed out. Neither will I miss the fact that you're always the last kid in line, I'm still waiting for Google Drive... The file explorer... well... a phone has a more advanced one these days.
I know Linux can be adapted to everybodies taste and preference, but I'm not the kind of guy that likes to tweak his OS an entire day, to get started. It needs to be ready to go in under an hour after a clean install. Will have to wait and see how this will pan out with Windows 10 after a year of updates.
I will miss the Terminal however
I'm just talking about desktops here, on a server it's Linux all the way.