I dont agree with the 99.9%, in the slightest

I dont dislike RDBMS because of the problems scaling them, I dislike them because of the impedance mismatch, because I dont like the sql language and because I am forced into creating a data model as the starting point of my application when I might not have a clue about what model I actually want.

I am much happier now that I have dropped mysql and using mnesia or couchdb most of the time, Its not about "needing more than mysql/postgre, its just about striving for something thats a better fit.