1. You mean "BSOD", but that's a detail.
2. Win7 has been incredibly stable for most users. As with any OS, there are exceptional cases, but overall Win7 has an outstanding record for stability.
3. Win10 continues that stability, and other than logging in (which seems to be a lot slower), it's as fast or faster than Win7 on most tasks.
But it's just not accurate to characterize Win7 as unstable or BSOD-prone, other than the occasional exceptional case generally due to third-party drivers and such. If you're one of the folks having such trouble, sorry to hear about it.
I posted MY W7 & W10 experience.
Anyone who thinks THEY know MY experience more accurately than ME is a blooming idiot.
Good grief...