If not yet used in Discourse, which is still on Ember 3.10:
I have a strong feeling that the refactoring of imports is a step by the Discourse team to make the codebase octane friendly and eventually move to it…
A great blog series on Octane:
https://www.pzuraq.com/coming-soon-in-ember-octane-part-1-native-classes/#whatareeditions
I’m starting to think that Octane is not a performance upgrade but a code simplification and structure upgrade but could be wrong.
UPDATE: It’s all those things. The performance improvements come from using Glimmer components. Someone is claiming 3-5x performance of Classic Components: https://discuss.emberjs.com/t/baseline-performance-of-rendering-components-is-slow/9707/6