A course on the newly unveiled GlimmerJS. Glimmer is a React-like DOM-rendering engine in which components are written in TypeScript. Glimmer emerged from the Ember.js framework and will play a large role in Ember's future.
Glimmer is super new and likely going to change quickly over the next year or two.
Glimmer is not very popular (yet) and so the demand for and recognition of its virtues may be muted.
Just teach Ember (status quo).
Dedicated TypeScript material instead of clumping it with Glimmer.
Wait and see where Glimmer is going before committing resources to it.