We regularly benchmark the "big 3" Cloud Data warehouses - Redshift, Snowflake and Big Query at SingleStore. Their performance is very close to the same (within 10-20%) on most benchmarks on reasonable sized data sets (10s of TB).
I agree if the performance of one of them fell behind the others for any prolonged period of time the cost to the laggard in market share would be much much worse then short term revenue gain of "being slow on purpose".
I agree if the performance of one of them fell behind the others for any prolonged period of time the cost to the laggard in market share would be much much worse then short term revenue gain of "being slow on purpose".