I agree, but the actual words used when this discussion comes up very often are much closer to "What idiot designed this shit?" rather than "My coworkers made architectural choices based on facts that are no longer true". (At Google the latter was perhaps more common, but I've heard the former in startups a lot more frequently, and certainly on Internet message boards.) I'm perspective-taking on the part of all sides; I hope that it's apparent from each side being called an idiot in turn and the company succeeding in the end that I don't actually believe any of the participants are idiots.
Once the next round of developers join, the scrappy MVP has usually been pushed far enough to be messy and maintainability becomes an issue. Seeing that might trigger the "idiot" reaction, The old guard appreciate how far it's come.
