Terraform gets to $600mm if you squint really hard make up stuff. Kubectl though. Whatever you want to say about kubernetes complexity, it does get a bunch of money run through it. We could also look at aws-cli, gcloud and az, and if we assign cloud budgets that get run through there, I'm sure it's in the hundreds of millions. Then there's git. Across the whole ecosystem, there's probably a cool couple billion floating through there. gh is probably much smaller. Other tools like docker and ansible come to mind, though those are not quite as popular. Cc only hits $1B ARR if you squint really hard in the first place, so I think in this handwavy realm, I'd say aws-cli comes first, then kubectl, then git, with maybe docket and terraform in the mix as well. Nonetheless, Claude is a really awesome cli tool that I use most days, I find.