Kbin is very young software. The dev was doing really well, then /u/spez dumped 10-bajillion users on it. I’m surprised the servers are still operating.

Lemmy’s a lot more mature, but it’s never been tested with this kind of traffic. It’s impressive that any of these sites are still going. I’d give it at least another month until things settle, adjustments are made, instances update, et c. et c.