The post popular answer includes: History of the browser user-agent string related discussions:
2022 (87 points, 20 comments) https://news.ycombinator.com/item?id=31246438
2019 (62 points, 22 comments) https://news.ycombinator.com/item?id=21085388
2018 (558 points, 168 comments) https://news.ycombinator.com/item?id=16525559
2013 (100 points, 32 comments) https://news.ycombinator.com/item?id=6674812