Does that really matter? The web is the past, present, and definitely the future. There will be less, and less native apps, and more and more web apps. JS is here to stay, and I'm glad big companies are pouring tons of R&D into making it faster, and easier to use.
No, JS is the one constraint we manage because it's the only stuff we got that is common to all browsers.
It's not driving anything, we keep hacking it to make it bearable. I mean, come on, the most popular projects in JS are all projects to avoid writing JS in the first place.