"Since Meteor is isomorphic, it gives us a very interesting advantage of tying code ownership to both front and backend code, which results in functional ownership not just code ownership. That emphasizes full-stack development, which is a priority for us. Our mantra is to do more with few people as we can, and Meteor lets us do that very well."

This for us is also the main selling point, it allowed us to group client, server, routing, assets, static files all in one package thus enabling architects to split web apps and by extensions teams vertically instead of the typical horizontal split (client/server) thus full functional ownership instead of code ownership.

This architecture pattern is discussed here: https://micro-frontends.org/ and enabled (I believe uniquely by Meteor's build system).