The purpose of the Ember Roadmap process is to rally the community around a number of shared goals. This post documents those goals for 2020.
So sad continue seeing ember engines and Fastboot ignored from roadmap 
Aren’t they not core features of ember.js? Why would they be mentioned at this time?
I think that’s exactly it, many people think they should be core features, or at least first class concerns of the framework and core planning. As it stands they’re still too much in limbo and don’t seem to get a lot of attention even though they are, as far as I can tell, pretty widely used.
I heartily agree with the top 2 goals.
Overall this seems like a great focus!
Named blocks, @use/resources and tracked lists will all be very useful! 
Sharing octane with more new users also seems like a good area of focus!