I'm curious what you meant by MongoDB being a barrier to entry? My understanding was that, for better or worse, Meteor abstracts a lot of that from the develop

I'm curious what you meant by MongoDB being a barrier to entry? My understanding was that, for better or worse, Meteor abstracts a lot of that from the developer. Were you unhappy with the queries that Meteor generated? Or did you find your application did not perform well, or in the way that you expected, and you believe this to be the result of the queries? Or were there issues on the deployment/operations side of things?