Founders: whats the moment your MVP stopped being enough?

I keep seeing the same pattern across early-stage teams:

the MVP works… until it really doesn’t.

For many founders, the hardest part isn’t getting something online
it’s everything that comes after:
• infra that cracks under real users
• code that no dev wants to touch
• rewriting the whole stack
• “AI-built” projects no one can maintain
• the moment you realize your prototype isn’t a product

We’ve been helping founders build for years, and these issues come up every single time. I’m curious:

👉 What was the exact moment your MVP became a bottleneck?

I’m collecting insights because we’re shipping something on PH next week, built directly from these pains. Any input helps. 🙏