This year's OSCON conference only had a single Ruby presentation

A good and accepted practice here on HN is to keep the original page title to avoid any bias from poster, and then add own considerations as comments.

PHP, Python, and PHP all have their own tracks.

I believe OSCON didn't historically had a Ruby track (but I could be wrong!) because O'Reilly had an entire conference instead, RailsConf. That was sold/given away/somehow ended up in the hands of Ruby Central a few years ago, and essentially Rubyists were used to having their own separate events by that stage anyway.