That... was not a very convincing article! It came across as a frustrated op-ed where the author intentionally focused on the negatives rather than steel manning their own argument. Any potential positives were handwaved as out-of-scope.
VSCode devcontainers are awesome. They are my default way of working on any new project.
Being able to blow away a container and start with a fresh, reproducible setup - at any time - saves so many headaches.