What is a reddit thread if not a root tweet with a bunch of replies (and replies to the replies) formatted in a way that you see the organization of the replies?
I like this idea and the Mastedon app seems much faster to post… that’s really my only wish list item from lemmy right now. I’m figuring that’s a temporary imbalance of increase activity and server bandwidth/speed? I understand we are decentralized but so is Mastodon and at least my instance is very smooth and fast.
I can't speak to Lemmy's implementation (I refuse to go near lemmy on account of the maintainers "politics"), but there's nothing fundamental about threading that should make posting slower.
Loading threads here is... different... work than loading your feed in mastodon, it's possibly slower, but posting is from a theoretical standpoint the same. Probably you're just seeing the effect of your lemmy instance not running on sufficient hardware (very understandable given the explosion in user space size).
In addition to the more important issues that fedi-tips discusses I find their stance on anti-vax and US-election conspiracy theories... unappealing, which you can see being discussed here: https://lemmy.ml/post/143057
And that they haven't been shy about exerting their power for political purposes. The hardcoded slur-filter was explicitly about discouraging "right wingers" (I put that in quotes because I suspect their definition of right wing and mine differ), and they at least use to be open about their intentions to moderate the instances that they run as explicitly "left wing" (though I don't see a reference to that on the current site).