The Funkwhale music platform is alive and in active development, and they're working on a feature to filter far-right artists off the network. Some Fediverse self-hosters are divided on letting a third party decide what should be allowed in their library.
Yeah I like being able to opt-in to a specific block list, or having it enabled by default but individual instances can disable it (more to neutralize bad faith arguments from trolls who want to normalize nazism), even though I want it effectively banned.
On the other hand, open-source software enables one to disable or edit those blocklists with a simple patch. It's just an extreme way of making it the default behavior, and therefore making their political statement stronger.
There might be a better way, but I'm not really concerned with this implementation.