I've used both Meteor and Amplify. Amplify has been fantastic for SPAs that don't need a backend database and require zero SSR. You get nice deployment tooling

I've used both Meteor and Amplify. Amplify has been fantastic for SPAs that don't need a backend database and require zero SSR. You get nice deployment tooling (especially for jr. devs) and CDN for very little money. When we started on our app, you could call a page generator during build, but doing dynamic SSR was not possible... yet... so we kind of dodged the bullet. Meteor was fantastic for building highly reactive apps with a small team. I think it got a lot of bad run for scaling up because it was dependent (at least when I used it) on tailing MongoDB's op log for reactivity. That lead to having to make very different architecture choices to make it work well, and I seem to recall each server instance getting bogged when they had 70-100 concurrent users , so you ended up using lots of containers for meteor application servers. Not sure where it all ended because I moved on to a different platform three yeas ago.