You made the right choice. You listened to your customers.
Many shops have literally tens or hundreds of setups.
SMED represents a significant investment in terms of both tooling and training. Theoretically speaking, this investment should yield a significant return in terms of improved up-time, faster turns on inventory and greater profitability. Ensuring that the theoretical ROI becomes an actual one is the role of quality assurance. This means establishing appropriate inspection processes to monitor production output and refurbish tooling to specifications, as required. For high-volume production shops it may also involve using SPC to characterize tooling wear, foreclosing on the potential for high scrap rates.