Another factor is that protocols propagate much slower than individual pieces of software
Email, the thing with the "@" symbol, was invented in 1971. Most people did not use it until 30 years later.
ActivityPub, the thing with the two "@" symbols, is now 5 years old. If we assume it will propagate twice as fast as email, it will take another 10 years until it hits the mainstream.
Calling it now: long-lived assistant personas that hold context for years at a time. "@engineering@orgdomain@openai.com where can I find the Frobber service documentation?"
Email, the thing with the "@" symbol, was invented in 1971. Most people did not use it until 30 years later.
ActivityPub, the thing with the two "@" symbols, is now 5 years old. If we assume it will propagate twice as fast as email, it will take another 10 years until it hits the mainstream.