Memes no, but I've found a lot of value in things like my hometown has a pretty active sub on Reddit which is useful for local information or subs around specific TV shows or video games bring a lot of interesting discussion or just asking questions on niche topics I'm much more likely to get an answer from a larger user base.
Hobby subs are the big one. If your hobby is anything other than dicking around with Linux, we probably don't have much of a community for it, if we have one at all.
Have you considered a Framework sailboat? They're a little more expensive, but they're designed with repairability in mind, and come with Linux pre-installed
In all honesty the lack of super specific and active communities on lemmy has actually improved my quality of life. I spend much, much less time scrolling and reading shit.
It's a valid point, but it's kind of like saying it's great that the restaurant you've started going to has such a small menu compared to the old one because you're not eating as much.