The short answer
Partly, and the parts that break matter. ARR assumes a stable recurring subscription, but usage priced AI revenue swings with consumption, so a single ARR figure hides a lot. Gross margin, which SaaS people barely thought about because it was always around eighty percent, becomes a first order metric once inference costs scale with usage. And LTV to CAC gets shaky when both churn and expansion are far more volatile than in seat based software. What still holds: CAC payback, net revenue retention, and the discipline of measuring cohorts rather than aggregates. The practical move is to report ARR alongside gross margin and consumption growth rather than on its own, and to say explicitly which revenue is contracted and which is consumption based.