

I disagree that commenting for the sake of commenting is a good idea. Quality over quantity, a single meaningful discussion is superior to a sea of low effort garbage. I also want the fediverse to take off, but not at the cost of adopting modern Reddit culture.
a “good post”, by this metric, is really just a post that baits lots and lots of engagement
Baiting anything is bad.
Matrix definitely is federated.
You ran into the trap of taking “fediverse” at face value. It neither invented nor monopolizes federation. E-Mail is federated and has nothing to do with the fediverse. Wikipedia’s page on federation lists the very internet itself as the prime example.
Not implementing ActivityPub doesn’t mean Matrix isn’t federated.