New proposed syntax adds even more noise: User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.1.2222.33 Safari/537.36 Sec-CH-UA: "Chrome"; v="74" Sec-CH-UA-Full-Version: "74.0.3424.124" Sec-CH-UA-Platform: "macOS" Sec-CH-UA-Arch: "ARM64" Why not getting rid of the `User-Agent` completely? It's already bad infrastructure design to have the server do different renderin…
Try browsing the web without any UA header for a week or two, and you'll understand. You get blank pages, strange server errors, and other weird behaviour --- almost always on very old sites, but then again, those also tend to be the sites with the content you want. Using a UA header, even if it's a dummy one, will at least not have that problem.
(I did the above experiment a long time ago - around 2008-2009. I'm not sure whether sites which expect a UA have increased or decreased since then.)
I agree with getting rid of all that new noise, however.