The babel transpiling takes about 5 seconds compared to the 200ms of npm scripts startup time. Since I haven't felt this pain of npm startup times myself as a pain I must be able to state that without being interpreted as negative, don't you agree?
Of course, speed increases are positive over all but this requires me to install something just to gain 200ms from whenever I run an npm command which isn't that often. I am sure there's a lot of people out there who this benefits a lot but I haven't personally experienced this is my years of doing node development.