As someone also in the "editor > IDE" camp, I agree that a single monolithic tool is maybe the wrong path to take.

But good coders still need powerful tools, just lots of tools, rather than one complex one. Simple and powerful are orthogonal.

I disagree that established industries have already optimized their tools. That's just blatantly untrue in real life, and for good reason. The tool makers always have the best tools. A journalist can't make a better tool for journalism without learning an entire new career (and tool making requires more experience than average as well, beginners don't make good tools).