I too am very frustrated by the absence of Routable Components. I had a small rant about it here: What are right uses of controller - #9 by RGL9032
The TL;DR; is that Routable Components will not be worked on until “Enhanced Pods” (or Pods v2) and Angle Brackets (Glimmer Components) have both been completed. Angle brackets is not likely to appear until 2.5. Assuming enhanced pods isn’t worked on in parallel, that put’s it’s earliest at 2.7 or 2.8. Only after both of those things have been completed, will Routable Components be worked on, so likely 2.11 or 2.12.
So if you assume that Routable Components is 9 releases and each release is 6 weeks apart, that puts it about 54 weeks out. Who knows what will really happen.
This makes me really sad and frustrated. It causes a lot of confusion for new users and it results in a lot of undesirable controller code or weird “fake routable components” for those of use trying to practice the proper patterns.