Yes, I think Windows Vista was the last of the "bloated" OSes from Microsoft. 7 is faster than Vista. 8 is faster than 7. 10 seems to be at least as fast as 8.
I said before that I'd wait a while to upgrade my computers. I couldn't stand it, and had to try it. I started with a Dell XPS12 ultrabook (i7/8GB RAM/200 GB SSD). The upgrade was a piece of cake, and Windows 10 just hums right along. No real change over Windows 8.1 that was on it, except that this computer will be on a current version of Windows forever. It switches from keyboard/trackpad input to touchscreen input like a champ (this is one of those convertibles, where the screen flips). I really have no qualms about it at all.
So then I upgraded our Dell desktop, an Inspiron 660s with Pentium G2030/4GB RAM/120 GB SSD). It, too, upgraded like a champ. No issues to report. Everything works very smoothly. It's at least as fast as 8.1 was.
Emboldened, I then upgraded an eMachines with an AMD dual core Brisbane that I had the Windows 10 Technical Preview on. As promised by Microsoft, all Technical Previews convert to a full copy of Windows 10. Not only is it a full copy of Windows 10, but it's a full copy of Windows 10 Pro. Nice. Though I don't really use that machine for much, it's got 10 Pro on it. And it, too, runs like a champ.
My final conquest was my old mid-2000s era Compaq laptop with a Celeron M 1.7 GHz processor (2GB RAM/120 GB SSD). It ran okay with Windows 7 (came pre-loaded with XP), and runs okay with Windows 10. The processor is maxed-out a lot doing updates and such. I browse safe, and use the included Windows Defender service, but I think the Compaq is struggling with it, so I may install the free Panda Anti-Virus and try it. It's a computer I almost never use, so I'm not concerned about it much.
For our two main machines, the Dell desktop and the Dell XPS12, Windows 10 runs beautifully, at least as fast as they did with 8.1. They're current on the OS, and that OS will stay current forever. Pretty good deal in my opinion.
