Yup, even without multiple users I took an open source speed reading app and quickly found myself a month deep in features just to expose it to multiple integrations for maximum accessibility. OAuth, MCP, CLI, API keys, secure and rate limited endpoints for content ingestion, parsing engine, a nice CI/CD pipeline that builds cross platform, a marketing site and it just kept going.
It was a test to see how much work was involved and what vibe coding felt like in one month. I plan on releasing it soon because I feel like it is the best speed reading app available but man it's a lot of work for even what seem like simple cases.
I'd be worried for anyone touching what I did if they did not have experience doing this.