Yes, although Reddit was more mature by then and had some communities already.

Sort of. Digg’s implosion was much more immediate, the changes directly impacted normal users so it was easier to mobilise people, and at the time Reddit was a bit more mature and easier to understand than Lemmy/etc is now.

My guess is we’ll see much more of a Digg-like exodus once Apollo stops working and the average user sees an impact.