Yeah, the only big issue with replacing Comms with Tags is that Communities can be extremely tailored to a very specific niche thanks to the silo effect and having attached mods. This only works when the network effect is powerful, like with Reddit, where you have millions of users, though. I don’t see Tags really allowing for that level of community building ultimately.

Simply adding Tags (global tags and local community tags) would go a long way in condensing the number of communities, which raises the level of engagement of communities.