Oracle seems to be doing good job milking RDBMS which was dying longer than Yahoo was around.
What the hell are you talking about? RDBMS Still run the world. Do you think your bank uses noSql? or hotel reservation systems, or the IRS, or well hell you know everybody everywhere. Just because there are some cases where nosql is useful does not mean relational systems are dying.
The herd instinct among economists makes sheep look like independent thinkers.