The language hasn't evolved for the same reason a transistor hasn't evolved: because it didn't need to. Adding for example string manipulation, or graphics, etc. would make it a fantastic language, but it would lose being that minimalist tool which makes it often the best choice when writing low level stuff. To me, Crystal, Nim, Rust, Go etc. already fulfill that need. About the electronics comparison, I can build a lot of complex stuff more fast and more easily using opamps or logic gates compared to discrete transistors, but if I need to do a simple basic task such as invert a logic signal or amplify an analog one I'm using a single transistor any day because it doesn't just spare all that wasted silicon in chips but also in many cases it will be more fast, more cheap and more quiet noise-wise.