I'm an example of a filthy casual reddit user who is really struggling to find value in lemmy. Finding an instance where local is of value is difficult, world may as well be "everything", and "everything" is a nightmarish hodgepodge of memes for teenagers, furry porn, really niche technical discussions, and star Trek memes. I never stay in the app longer than a few minutes and I feel like I spend more time blocking weird porn communities than I do reading interesting articles.
The other major issue is having to sort through the exact same article 60 times because people cross post not only to local communities but then also the same communities are duplicated on every instance. I'm probably going to abandon this soon unless I can find some kind of curated community list to subscribe to or something.
The big difference is 1. Finding communities is not easy. Can you name every one of your interests off the top of your head? 2. Just punching in communities from reddit 1 for 1 doesn't work. 3. Content and user base. There are no discussions for my favorite podcasts here and if there are where do I find them.
It took me a decade to build out a decent sub list on Reddit and I still stumble upon new interests now and again. I don't know how to "stumble upon" decent communities on Lemmy and I'm sick of wading through cartoon horse cocks.