We have to peg quality with rigorous testing or else cost (time spent) will be variable upwards to infinity (due to accumulation of untenable technical debt).

We have to peg quality with rigorous testing or else cost (time spent) will be variable upwards to infinity (due to accumulation of untenable technical debt). Therefore, if cost must be pegged due to limited time/funds and quality must be pegged due to existential risk then quantity/richness of features must float and be flexible. All good product owners will learn this truth eventually.