I'm just gonna say I oppose this proposal because I'm really tired of seeing developers shy away from utilizing or learning C/C++ only to admit much later in a project's life cycle that those languages and their associated libraries are the best for the job. I'm all ears on utilizing JS for front end to even a desktop application but if the entire thing gets written to be ran on Servo or whatever browser engine they choose then I oppose it categorically. JS might be fine for some things but as a general programming language on a substandard runtime is just asking for trouble. Learn to write in C/C++ for native applications or go home.