I just installed windows 10 yesterday as an upgrade to windows 8.1.
it kept all my settings, in a very accurate way except for one : it replaced my browser with edge. So at the first reboot I launched chrome, and it whined about not being my defaut browser, so I clicked the "make chrome my defaut browser" button, and a window came, recapitulating my prefered apps for music / videos / etc, I thought to myself that it was thoughtful to show me all those settings, but I had other things to do, so I closed that window.
Well, next reboot, same problem : chrome wasn't my default browser, you actually have to go to the bottom of the window that pops up, and the deselect edge for your prefered browser at the bottom of the window. So I finally did it.
I thought about the same thing : "
well I think I know why, I'll be sure to check edge's market share in the next months.