I agree, and I'm sure that the stagnancy of the plain old terminal is behind this and other modern takes on terminal emulation.

I personally prefer that the terminal delegate just about everything besides I/O to plugins or extensions, so Hyper is probably out of the picture for me. That being said, my current terminal of choice (urxvt) doesn't do much on that front either. I hope that other terminal emulator projects pay attention to the development here and adopt the best innovations.