I am probably being stupid; but aren't install commands run relatively rarely by developers (less than once a day perhaps)? Is it such an important issue how long it takes for `x install` to finish?

Or is the concern about the time spent in CI/CD?

CICD is a major usage. But dependencies version bumps are also a big part of it. In the python ecosystem I’ve had poetry take minutes to resolve the ansible dependencies after bumping the version. And then you see uv take milliseconds to do a full install from scratch.