Yup, been through a couple of those. What tends to happen is the very senior engineers get architecture-itus and believe they'll actually be able to create this wonderful, flexible architecture that will withstand any future req change. Millions of dollars later, it's tossed in the trash and the old system is still selling, but customer retention is so high a focus at this point to stem the tide of exodus that all the developers do is put out fires now.
