[65a]

This. I've worked in both greenfield and brownfield areas. The chief failuremode of greenfield is that it works, but it is unscalable and shoddily done. The chief failuremode of brownfield is some kind of feature cardinality explosion that becomes impossible to maintain after some critical juncture. Reading between the lines, they're sort of the same failure mode happening at different times, but both driven by results-driven-programming rather than architecture.