[m52go]

There's nothing (I know of) with a more radical approach to the full-stack web than Meteor.

No one's saying you need to keep up with all the JS frameworks, but if I were hiring a JS dev, I'd expect the person to understand the pros and cons of the most important ones. Meteor is categorically one of the most important JS frameworks out there.

I'm not sure about a way to determine the "best" or "most important" frameworks. Perhaps number of appearance on the HN front page could be a heuristic?

"Not free" is not quite right. The software is open-source & MIT licensed. The entity is for-profit, as it intends to sell services adjacent to the software, not unlike Acquia & Drupal.