The only bug I've had with Datacad was squished a few patches back, and actually improves Datacad. Once Datacad is running we can once again quickly open AEC files by double clicking on the file in Explorer to open them and they open just as fast as the File Open menu does and like the old hardlocks did. It no longer is doing some sort of license check in the background. It's great!
As for Windows 10 it's self, I love it. Been running solid on 30 or so boxes I manage. Most of them are between Intel Core 2 - i7 class systems, but several are old Windows XP and vista era laptops. As long as you have at least 4 GB of ram, 6GB recommended if sharing the ram with a video card, a Core2 class or newer processor, a decent harddrive and your components are not some knockoff brands, there shouldn't be a problem. There are a few minor glitches now and then with stuff that uses the new UI. Sometimes they will not launch the first time you try, but then it will a second time. Normal win32 apps have all been running fine. There is really only 2 picky things that bugged me. First was I added Start10 as a start menu replacer because I used the old style jump lists a lot. Second thing is that the Navigation Pane adds temporary shortcuts to things I've visited recently and it fills up with junk I don't need.
Backup those files or make a system image and make the jump!
If you are using the free update, you can roll back to your previous version of Windows within 30 days if you can't stand it for some reason or have something that's not working.