You can increase performance at the cost of increasing customer switching costs, or vice-versa. Ideally, you would like to have an improved product that is also compatible with the installed base, but technology is usually not so forgiving, and adapters and emulators are notoriously buggy. You will inevitably face the trade-off.
Shapiro, C. and Varian H.R. 1998. Information Rules. Boston: HBSP. p. 191