I might be in minority here but I kinda see the point the Readium guy is making, specifically this one:

We managed to convince publishers (even big US publishers) to adopt a solution that is flexible for readers and appreciated by public libraries and booksellers

Publishers and companies will always want DRM so at the very least we (as a community) could offer a DRM that is less flawed, more respecting of privacy and FOSS, etc. If we dont, someone else will offer a DRM solution thats far worse (and publishers will implement it because they dont care and there are no consequences).

The MAU of lemmy.world is ~18,600 which is a bit greater than the combined MAU of the next 7 instances (a big help here is lemm.ee which has ~7000 MAU). This is a really healthy spread of users and it means we don’t lose lemmy if the biggest instance goes down.

Compare that to Mastodon, where mastodon.social has more MAU (~372,000) than the combined MAU of the next 30 instances at least (I gave up counting). Thats not healthy for the ecosystem. Though tbf the total MAU of mastodon is ~899,000 so without mastodon.social they will still have ~527,000 but it will be very spread out.