A marvel of engineering, really? In find using bloated browser tech and napkin-designed language to build a barely functional IDE as "impressive" as building a mile-long pedestrian bridge using Popsicle sticks and chewing gum.
I'll take browser tech + JS based IDE over a streamlined ASM based one that updates at a glacial pace any day. Which is why there aren't really any other great options, traditional IDEs can't keep up. Even MS' own original visual studio product - there's no point to it anymore.