I think it’s also a boom and bust factor here. Take Elden ring for example, that subreddit popped off when the game released and still has a decent yet not nearly as active user base as before. It’s unlikely that cultural influences (aka meme potential) is strong enough currently to move that here to Lemmy. That might change with the exspansion coming out later. I think this example applies to most other organic communities on platforms like Lemmy. There needs to be some type of “buzz” and social interest in a given topic. Over time, I think we will see that happen more and more on Lemmy as well. Reddit was not built overnight and had to undergo the same process taking many years to be as robust on content as it is today.