In early 2017, AMD released the first Zen processors for socket AM4, and had promised to support that platform until at least 2020. 3 solid years of support sounds great for a socket, but what ended up actually happening went far beyond their original promise. They continued to release new Zen 3 CPUs up until late last year with the advent of the region-specific release of the 5500X3D, which makes AM4 support span a ludicrous 9 years, with firmware updates still being supplied to this day.