"multi Reddit" like feature do not fix the problem.

First, like on Reddit, less than 5% of users will use it as a non default feature which needs to be configured.

Second, even of those people who use the feature, they will have different sets of differently configured "multireddit".

The end result is a fragmented audience that has no shared experience and never aglomerates to critical mass.

If you have 1725 /c/books communities, that does not make one cohesive books community. These people have nothing in common.

Practical end result, one books community on one Lemmy instance, is "the one big community" and almost every other gets 1 post per year on average, which is never seen by anyone.

For every big community, every once in a while, the moderation dictators sell out or otherwise piss off the community enough that it fragments. That works as well as the current transition from Reddit to Lemmy.

Each schism doesn't create a new, better community, it creates a smaller, less active community at the expense of the larger one.

There needs to be a single point of agglomeration, which works by default for any community name.

And moderation needs to be something dive by every user and moderation needs to be a filter that you subscribe to.