@Gargron I don't like it.
I joined the fediverse some months ago and really enjoy that people talk with each other and not about other people, which I think will start with commented boosts.
I think it is a good thing that discussions related to a toot are only possible in one direction and avoid fuzzyfication of discussion.
It avoids that accounts with high numbers of followers take over the work/ideas of others and start a new discussion in their bubble.
Just my 2ct