I always check coinmarketcap.com every day and all trending projects.
Among trading projects, there are a lot of dogs meme coins. They raise a lot because dogs meme was a trend of 2021.
But maybe in 2022 the trend will become a cats meme coins likes this https://twitter.com/angrykittytoken/status/1479171278171000833
Everybody like cats and they are more popular in internet then dogs
The quantity of new projects depends on the market.
When the cryptocurrency market rises there is a big demand for new projects that is why the quantity of new projects is big.
When the cryptocurrency market falls people stop investing in cryptocurrency and there is no demand for new projects.
I agree that there are too much cryptocurrency projects, but a lot of depends from the demand in them.
If demand in new projects is high and market rise a many new projects appear.