It was actually released in 2016. And it's currently tied with LGA 775 for longest support window. And if it actually gets the 5500x3d and/or the 5700x3d or these GT chips next year? It'll actually be the longest supported socket ever unless im mistaken.
AM4 actually had chips before Ryzen with old Bristol ridge apus. Which released in 2016 before Ryzen came along in 2017.
So in theory you could go from an old Bristol Ridge steamroller based chip all the way to an r7 5800x3d on one motherboard in theory...
I would. Heck on my GF's PC I just upgraded her from 8th to 12th gen. Skipping LGA 1200 entirely. On my HTPC it's 8th gen also, and I'm gonna wait for 15th gen and decide what to do with it then might go a budget end of life LGA 1700, an AM4, or 5 setup.
On my personal PC I had an r5 1600, now a 3700x, and I'm thinking I'm gonna get a 5800x3d and then skip AM5, and get whatever the first gen on AM6 or the Intel equivalent at that time. Unless something before then really compels me. Then I'll have had a motherboard last almost 10 years from 2016 to 2026ish, and hopefully can repeat that again with AM6.
The 5800x3d just seems like a great hold over until then, unless the CPU wars speed up again.