>it will be harder to find someone to talk to understand what they were trying to do at the time.

IMHO, there's a strong case for the opposite. My vibe coding prompts are along the lines of "Please implement the plan described in `phase1-epic.md` using `specification.prd` as a guide." The specification and epics are version controlled and a part of the project. My vibe coded software has better design documentation than most software projects I've been involved in.

I assume you have some software engineering fundamentals training.