Still buggy in my setup, Edge is a POS still, Even on this site, I have it just close for no reason (and I reset it back to factory), so need to use IE for sites including this one. About 3-4 older programs that worked fine on WIndows 7 x64 and WIndows 8.1 x64 DO NOT work at all under Windows 10 10240. So they did not fix application compatibly. Laggy performance on some tasks, even just Windows Explorer, it will hang when loading drives (this is about a 3 month old system, upper gaming system, so not a slow machine at all) on Windows 7, this takes about a 1/2 a second to show.
So, far, if this is RTM, not impressed. I guess it will be ok after 275 windows updates...Like Vista was...sigh, Windows 7 looks better and better.
It might be time to Nuke it back to factory (or at least Prep a 7 install to take the official 10 update)