When I first started working with ember many years ago, I felt the same way. But now after working on many ember apps, I feel the opposite. The "convention over configuration" really only applies to basic application structure e.g. routing/templates/controllers etc. All it's really doing is creating a standard place to put files, which itself is flexible and more recently allows e.g. colocated components like you'd see in react/vue/etc.

I think the core point from the article is just how much ember.js has changed and matured. If you read to the bottom it looks like single-file components with glimmer are in the pipeline as well.

But it’s definitely not the worst idea. People who like that approach seem to be extremely productive with it.

It’s definitely not my cup of tea though.