Lemmy simply lacks a wide range smaller niche communities that exist on Reddit i.e. odd hobbies, smaller sports niches, etc.
I’d rather that I didn’t have to keep using Reddit for those smaller communities, but I have replaced 80% of my Reddit usage, so I’m not complaining.
When this is brought up, the typical responses is the well-meaning suggestion to “start it yourself” or “be the first”, except that hasn’t been fruitful in my experience.
The communities that I still use Reddit for, are already present on Lemmy and have been open for years, but they lack the amount of user necessary to make them worthwhile.