I second that "piece of shit" -- RDBMS are bad tools for some jobs, and there is still a lot of space for specialized kinds of database; especially I believe in

I second that "piece of shit" -- RDBMS are bad tools for some jobs, and there is still a lot of space for specialized kinds of database; especially I believe in a need for a lightweight (and ^^ slow ^^ :) decentralized document-oriented database. And yes, again, this kind of database will not be suitable for every need, but for some domains only.