If I'm being honest 1st of July will most likely be the last big splash and the last big grow for the alternative platforms. Afterwards I don't think the growth of Lemmy or similar platforms will be as big. Most of the mods will be silenced, subs opened and in 1-2 weeks it will be forgotten.

Reddit is way bigger than Digg was back then, has an impressive number of users so it's pretty hard to bring it to its knees. I hope I am wrong and that I am just pessimistic.

However I think the bad part for Reddit is that knowledgeable people and people you can hold a discussion with or to ask for help in different areas, are leaving/have left Reddit so the quality of posts will dilute.