It solves the whole problem. You get the interactivity you need combined with the performance. There are other aspects to the "whole problem" -- you also need

It solves the whole problem. You get the interactivity you need combined with the performance. There are other aspects to the "whole problem" -- you also need a massive ecosystem with adoption across disparate communities (devops, web development, etc). And decades of momentum. That's why Python isn't going away anytime soon, despite its slowness and warts.