I do have the same feeling about what other people feel about realtime pubsub, but people highly underestimate the improved user experience when done right.
In my case i have projects that are event sourced, built with the CQRS approach or a flavor of them. They require a mechanism to notify users when a state jas updated. Meteor and pubsub are a major asset in that.
Its understandable that most people don’t want to use pubsub for standard websites. Its just overkill. Then again I find even React or Vue to be overkill when it comes to standard websites. I’ve build the public site for my saas platform using a simple bootstrap template and some added html and custom styles within a day and am hosting it in an AWS bucket…
In the end its about the choice of tools for the job to be done. Building a saas? Appsync might be a major asset