The problem with this is it requires introducing a vast zoo of features distributed across the spectrum of power, and it is not at clear that it is actually easier to learn this whole zoo so you can select precisely the least powerful point on it, than it is to understand the use of a single (or small number of) all-powerful constructs within its context.

My goal is “most reliable and concise for experts,” because we should spend most of our careers as experts, and “easy to learn” requires bad tradeoffs too often. Learning common names and reusing tested implementations pays off over rolling my own on the spot and forcing everyone else to re-read it.