That's great for those altcoins and I'm sure the owners will love being listed on Coinbase. However, I still think Coinbase needs to make more of those coins available to all of their customers. I could be wrong, but many of these alts are only available to those who use "Coinbase Pro"... It's still a great exchange, but the number of people you reach on an exchange like that is going to go down quite a bit when only a certain group of people on the exchange can actually get it.