Is that really true? Granted I'm working on low volume stuff (1000's of units) in a niche B2B setting, but the times for rolling out a new rev of a board can so

Is that really true? Granted I'm working on low volume stuff (1000's of units) in a niche B2B setting, but the times for rolling out a new rev of a board can sometimes be measured in quarters. Changing traces/components can have unforeseen effects for even fairly minor things, you can't just have a Tier1/2 CM tool up without a round of DVT. I doubt boards with the same PN change very often if at all, but I'd be curious to know if i'm wrong.