To me the question is more that if another potential migration to Mastodon starts, will more people stick around this time? https://absolutelymaybe.plos.org/2025/10/30/a-mastodon-migration-from-bluesky-would-be-different/ argues yes, and includes the availability of quotes as one of the the reasons. My thoughts (basically that if a migration happens it's likely to be to fedi as a whole rather than Mastodon-centric) are at https://neuromatch.social/@jdp23/115463881540776188 ... and I don't mention quote posts.
I wouldn't say that the problem back in 2022 was that people didn't come to fedi; it's more that most of the people who came had bad experiences didn't stay. Talking with people who didn't stay (as opposed to talking with people here about their perspectives of why people didn't stay), the lack of quote posts wasn't high on the list. Sure, it was mentioned, but at least with the people I talked to, it was much more in terms of how the discourse around quote posts was part of the overall anti-Blackness that drove people away... I think I have a bunch of quotes about that in something I wrote at the time.
And if you look at Erin's "Mastodon is easy and fun except when it isn't" discussion of why people didn't stay, the lack of quote posts is barely mentioned. How much progress is there on other stuff? Good question ... but it's not like Mastodon diverted all development efforts to get them out; they were able to get a grant from NLNet to fund them, didn't even start on them until after 4.3 was out.
@oblomov