I really wish the browser vendors would come together to establish a plan to clean up User-Agent. It's one of the worst offenders in header legacy[1] and fingerprinting. Exposing what browser I am using and it's major version is fine but I don't think every website I visit deserves to know what OS I am using, nor the details of my CPU.

[1] https://www.nczonline.net/blog/2010/01/12/history-of-the-use... (2010, though little has changed since then).