I'm not saying that MongoDB isn't growing. I just think that it's way early to pronounce it as a replacement for MySQL.
These kinds of provocative but false titles belong in the cheap tabloids, not on the front page of Hacker News.
i tried to explicitly make the point that MongoDB is not a replacement for MySQL, it is rather following a similar path from a licensing, usage and market reaction standpoint. and that mongo's course within the nosql world may follow the pattern we saw mysql track w/in the relational database market.
from this comment, it doesn't seem like i was successful on that score.
MongoDB is indeed an interesting software and it's on a promising start. I'll be interested to see where it's going. Maybe one day the title of your post will be true.