> because some new requirement came along that didn't fit our nice architecture.

This is the thing.

I was doing the event section of the website and it was the event. I mean, it was preposterous to even think of running multiple events. Fast forward a few years, the company is now many times the size after very rapid growth, has an office in the UK and now runs multiple events. Would you have made an architecture for multiple events back then? YAGNI whispers you not to...