The mainstream is not only defined by what's most popular, but also by what sets the trends. The masses always get the message with some delay...

Besides, all of the three languages that you've mentioned are turning more functional and less OO with each year...

JS still has OO (and recently got "classes" as sugar), but it's not used in the crazy deep-OO-hierarchy style at all.

Java, that used to cherish that style also abandons it nowadays (with closures, streams, etc.).