how much does long term maintainability actually factor into vibe coded launches

Genuinely asking, not trying to dunk on anyone building fast. when the AI generated codebase behind a launch needs a real feature added six months in, or a security fix under pressure, what usually happens. is maintainability something builders are thinking about early, or is the priority almost entirely getting to launch day and figuring the rest out later

there's a version of this where it's totally fine, the product gets traction and someone eventually brings in a real engineer to clean things up. and there's a version where the technical debt is deep enough that it needs a full rebuild anyway. curious where people think most vibe coded products actually land on that spectrum