I have a dual boot system I just built last week, 7 on one SSDI and 10 on another.
I was impressed with how fast it boots, but while 7 was stable when I overclocked, 10 wasn’t.
It seems like Microsoft adds new bugs with each release, fixes them and introduces new bugs for other people.
I’m on the fast ring and the back button in IE 11 stopped working with the latest build (11099), were going to BETA testing it for Microsoft for months to come.