A large percentage of threads I've created or participated in have been deleted. Worse is that when visiting the URL everything is completely gone.

This is much more drastic when compared with Reddit thread deletions, where the thread is there and so is the discussion. And the creator of the thread has access to their content.

The Lemmy method discourages people from participating in threads and creating high-quality content, much more so than the Reddit method.

A bunch of lively and useful discussions on Lemmy have completely disappeared. And it makes it seem like a waste of time to even contribute content here.

EDIT: I see that the "fediverse" link for posts has been removed. I posted this to lemmy.ml from a lemmy.world account and there's no way for me to get the lemmy.ml link now. And when I crosspost it it shows a lemmy.world link instead of the lemmy.ml one. I think this should be changed [back].