> User interfaces benefit greatly from dynamism

I'm not sure. I've written so much GUI code over several decades, and I think dynamism is only slightly helpful. I've been writing a new GUI in TS (not at all ready for publicity yet) that aims to rethink GUIs from the ground up as if the 80s and 90s never happened, but with the benefit of hindsight, much like Go did with C. I've been meaning to do a proper write up on some of the innovations I think are genuine improvemenets over the status quo. I should probably do one at a time and start today instead of waiting until release like I planned. But in my GUI, dynamism is only needed in maybe one or two core places. I'm not sure it makes any use of the fact that JS has string keys (equiv of objc_msgSend/etc), and can probably be written in boringish C++ just fine, or maybe even boringish Go, although op overloading would clean up one or two APIs really nicely.