I work as a consultant so I navigate different codebases, old to new, typescript to javascript, massive to small, frontend only to full stack.

Claude Code experience is massively different depending on the codebase.

Good E2E strongly typed codebase? Can one shot any feature, some small QA, some polishing and it's usually good to ship.

Plain javascript? Object oriented? Injection? Overall magic? Claude can work there but is not a pleasant experience and I wouldn't say it accelerates you that much.