I can verify the author’s experiences below.  I have a Surface 3 and an HP laptop running windows 10.  I also have a shuttle box with a sandy bridge core i-3 cpu and 8 gigs of ram.  Edge is a total hog.  It will grab everything in ram it can and then force the system into heavy swapping.  It is my opinion that Windows 10 is malware(due to Microsoft forcing it) and that Edge is nearly as bad.  If you do not have to run Windows 10 don’t.  If you already have it run anything other than Edge.