I honestly can’t remember, but isn’t the old adage to do a clean install anyway when upgrading?
Personally, I bought a back-up drive, which I’d arguably needed anyway, and backed up everything before upgrading. I did lose a few installed programs, such as stuff that I’d long forgotten the activation keys for, but none of that was stuff I’d used or cared about.
Browsers tend to have backup/restore functions, or even cloud backup/sync functions. Or you can just copy the old data directly into your new install. Or start fresh. Just make sure about any saved passwords.
Most Steam games can just be copied over to a new drive, then when you go to install the game through Steam it will find the existing files and use them without having to redownload them. This doesn’t work with all games though. Steam has its own backup feature that will pack a game into a file that you can then restore, but if you have a lot of games that can honestly feel like it takes more time than just doing it the brute force manner. (Besides, if you are like me, then you don’t really need most of your installed Steam games to be installed, and you can treat an upgrade as an excuse to cut some fluff.) Biggest issue here is save game locations for stuff that doesn’t have cloud saving. (A few games even go out of their way to hide save file paths.)