The fact that you refer to "man-hours" makes me suspect you underestimate the magnitude of the problem. The correct measuring unit for the things you're talkin

The fact that you refer to "man-hours" makes me suspect you underestimate the magnitude of the problem. The correct measuring unit for the things you're talking about is man-centuries (and not one, but several), as far as I can see, just for the first item in your list. People have been making compilers targeting JS for several years now. Do you really think there are 200-300 people doing this full-time?