The telemetry stuff still irks me, but a lot of it can be turned off. And the "can't disable/skip updates part is scary because trusting Microsoft to get updates right all the time seems foolish given history.
Having said and accepted all of that though, I am absolutely amazed how smooth and responsive Windows 10 is, especially on older hardware.
I did a laptop that was running Vista (Dell Insperon 1525 with Intel Pentium Dual Core 1.86GHz, 2GB RAM, and 120GB HDD). Fresh install of Vista ran so sluggish it made it a miserable and frustrating experience to boot up and use.
Fresh install of Windows 7 was a little better but not by much. When I installed Windows 10 on it, it now boots to the desktop in under 30 seconds and apps launch and respond virtually instantly again.
It has its warts, for sure, but the performance so far has been remarkable and I haven't had any of the issues mentioned in the original post on any of the five systems I've put Windows 10 on.
My only problem with it was that Cortana stays running even when you turn it off and that process sucked up 35% of my memory until I renamed the Cortana folder to prevent the process from respawning...I am dreading the next update that respawns Cortana despite my fix. was not found on this server.