The bloat really started with the 2020 drivers at the very end of 2019. The AMD External Events Utility service was around before that, but It's one of the many things we don't understand. Heck, the AMD PCI "driver" isn't a PCI driver. AMD is bad at transparency or making it clear what something does. If we do get anything, it's very cryptic or very dumbed down. As for the downloads, they correspond to the version of .NET they are targeting. Unless you installed 3.1 or 5.0 runtimes on your own, the 4.8 version is a safe bet since it's included with recent versions of Windows 10. They are all functionally the same. It's the same code, just built a little different. Once .NET 6.0 comes out near the end of the year, 3.1 and 5.0 versions will probably go away.