There's one issue with Meteor that rarely gets mentioned. While you get hybrid mobile apps out of the box, you'll have hard time integrating native apps with Meteor backend. DDP clients are not official, and there's no minimongo on native clients so you lose critical part of Meteor's appeal. In the late game switching to native apps is more cumbersome compared to when you have a regular REST API backend. But still, Meteor is a amazing piece of technology and I'm happy to see this update.