And what would you expect from a forum named Bitcointalk? We are lucky that this forum has involved and let other alts have their own sub section here and typically you will almost always see new projects popping out and there is really a few discussions going on aside from their ANN threads. From what I see aside from Bitcoin we will only see alts like ETH and the stablecoin Tether to be mentioned in other boards outside of the the alt section because ETH is the 2nd popular crypto and Tether being a stablecoin that can be traded in a crypto exchange and also its scandals. Cardano is not a bad crypto you are just looking at the wrong forum to see discussions or talks about it, maybe try visiting their subreddit page if you are looking for some content.
This is an altcoin speculation sub and Cardano should just have more attention while the fundamentals in terms of tech were always there and now the team is delivering where we have waited for over a long time.
Btw, I have read every single article and Reddit post about Cardano in the past years, just the reason why I'm 100% convinced Cardano will become the future Crypto leader in terms of tech and adoption.
On topic: I think a set of top altcoins will survive the next phase, which will be crypto adoption and implemented real use-cases for business and governments. Cardano and some other high quality projects like Ethereum, ChainLink, Stellar, etc will all have their share and own use-cases.