I wouldn't argue with that about memes because they're here to stay for sure but we don't generalize that all of them are going to stay. The most common and top ones are going to stay but many of them are made trying to fish some money in the market but mostly failed. Those are the ones that will be removed eventually. So, out of the thousands or many of meme coins, there will be only few that shall remain in the mainstream.
I would say we can't say any of them will stay neither, we d onto know the future and making assumptions that they will stay is not really a smart way. First of all we know that only a few are good, we check the ranks and only like handful of them are highly ranked, the rest are purely shitcoins and nothing more, the yare all terrible, I can name you 5 memecoins that are ranked well, there is no sixth, they are all terrible and should not be invested.
I would agree that those five could stay, there is a big potential that they could stay, they have a good amount of community to keep them going and I would understand if they stay, it would make sense. However, we can't even say that about bitcoin itself, saying they will stay is not really a smart thing, always be on the lookout and these are all hyped stuff so when hype dies down, they may not stay too, that's an option. I am definitely not saying they won't stay neither, I am just saying there is no guarantee.