What would you say are meaningful metrics for startups / tech companies cloud infrastructure costs that one should look into and monitor closely?

So far I have come by the following metrics:

- Cloud Cost as % of Cost of Revenue

- Cloud Cost as % of ARR

- Total Annual Cloud Cost by Company Headcount

Do you think these are useful? Would suggest another metric?

References (with values):

[1] https://a16z.com/2021/05/27/cost-of-cloud-paradox-market-cap-cloud-lifecycle-scale-growth-repatriation-optimization/

[2] https://cms.harness.io/uploads/Harness_Saa_S_Cloud_Spend_Survey_2020_884eb6a583.pdf