With fascism looming over our heads as we speak, to see people over at the Fediverse shun ATmosphere is downright disrespectful and ignores ActivityPub's origins.
Before ActivityPub, there was OStatus and was limited to StatusNet. StatusNet, like Bluesky, was both a company and software. Like Bluesky, they open-sourced the software to create a bigger ecosystem.
StatusNet was a company with software named after it (now GNU Social), and its goal was to federate microblogging. Their software used a protocol called OStatus. It was based on hodgepodge of other software and saw little adoption. Mastodon was one of the few exceptions and soon became the dominant federated platform. Meanwhile, StatusNet decided to start from scratch and created ActivityPub with Pump.io as their testing ground. When it was done, they handed it over to W3C. Afterwards, Mastodon adopted ActivityPub between 2.x and 3.x. Bluesky has a similar roadmap.
The Fediverse is missing the fact that Bluesky contains the exact same kind of people as them. They hate fascism and everything associated with it just as much as the Fediverse. The developers of Bluesky had the rug pulled under them twice. First, Dorsey left when they added stricter user moderation, and then Elon took over Twitter, their primary source of funding. Naturally, Elon sees Bluesky as a threat and target now. The last thing these people need is the Fediverse, the one group who share similar visions, shunning them too.
Bluesky is only now being VC-funded because it is at risk of losing funding from Twitter if it hasn't already. Bluesky, like StatusNet before it, is still young. The protocol, although structly sound, is far from mature.
