Mostly just shows that open systems require more resources to develop at as rapid a pace as closed systems.

Email/Usenet were fossilised the day they were born pretty much, we're still living with stupid fixed width lines of text in 2022, people just gave up on replying correctly, and no one could fix usenet spam.

Web apps have instant new version deployment, but are centralised, automatically updating docker containers are probably a half decent solution to a federated network.

The most popular website creation system is Wordpress though, that's mostly open and decentralised