Coelacanth

Exactly. It’s harder than it sounds to ask the right “why”.

Search-Lemmy is under development for this.

Kbin doesn’t have an API and so it’s probably less straightforward to dev for. Plus Lemmy is older and more established. I believe ljdawson said in a comment somewhere that he’ll work on Kbin integration somewhere down the line. I think that’s the way it will go for most of the apps.

Yes, 60 is pretty much a goldilocks number that is small enough to be easily graspable for most humans, but still a highly composite number (11 factors!) so it is neatly divisible into many smaller units.