So common that it justifies a change of language? "Oops, this thing that should have run for 5s has run for 30s, something must be wrong, <cancel>". You can even automate that reasoning by way of a timeout. In a hypothetical world where I'm choosing between two otherwise exactly equal configuration languages, I suppose this would give the advantage to Dhall, but honestly I'd probably pick TypeScript because making an entire org learn a new syntax is far more trouble than that saved by non-Turing-completeness.