I've been talking to dozens of PMs over the last few weeks who prototype with Lovable, Bolt, Figma Make, V0, etc. Same frustrations keep surfacing.
Output looks a bit generic: looks like a demo, not your actual product
Context loss: explain your product in ChatGPT/Claude, then re-explain in Lovable, then again somewhere else
No edge case thinking: AI executes prompts literally, doesn't challenge or expand on them
The core issue I keep seeing: these tools are interface builders. They're great when you already know exactly what to build. But the hard part, thinking through the flows, the states, the edge cases, where users will actually get stuck, that's still entirely on you.