The two initial waves of migrations from Twitter to Mastodon absolutely happened when "shit it the fan" in the Twitter world, just like now with Bluesky.
And if that's not a fair comparison, and neither is comparing them straight up by data right now, how could be fairly compare them then?
What would be more interesting would be to compare Mastodon with bluesky when Mastodon was as old as bluesky is now.
Is this something someone can figure out?