Those kinds of subreddits simply doesn’t have any equivalent in Lemmy, and even if it did, it is far far more inactive compared to its Reddit counterpart. To me that is one of the biggest problem with Lemmy right now and kinda could be a reason why there is still many user who sticked into Reddit and does not 100% migrated to Lemmy.

Agreed completely. I still have to go back to Reddit regularly becuase its the only place for discussion for a lot of my interests. For example, War Thunder, despite being a massive game, only gets a post or two a month here (all recent ones by me) and zero activity beyond that. I can’t even go to the forum, because they ban anyone who criticizes the game or says anything they disagree with. That leaves me with just Reddit, so I’m stuck going back regularly.