I disagree somewhat with their take, but there's definitely languages that cmoe with features built-in that reduce the need for a fancy IDE. For example, instead of null checks via annotations that the IDE has to parse and warn about, just have nullable types. Or instead of IDE features to generate a bunch of boilerplate, just don't require that boilerplate.

That being said, on the other side of the spectrum, anyone writing code without using an LSP is just throwing away productivity by the handfull.