AMD bought ATI 19 years ago and they were never able to fully integrate both companies together. Lisa Su should have been fired 2 year ago when it was obvious she missed the AI boat completely. She's an awful CEO, Rory Read was the one who hired Jim Keller back at AMD and created the road map up to Zen 2. Zen 5 is barely different from Zen 2, it's the engineers at TSMC who are making the real work, not AMD's.

Most of the popular instances are not branding themselves as being Mastodon-based. They exist to fill a niche in social media free speech like Pawoo. It's like for free software, the most successful examples don't use their GPL license as their main selling point, it's just a bonus.