I’ve never seen a startup with a multi million line legacy codebase.
>”Have you worked at many startups?”
In response to a question about a legacy codebase at a startup. That implies that they think whatever they are doing is common. And forking a multi million line codebase and heavily developing it isn’t common for startups.
OP might just be working at a small software company or for one that broke from a bigger one and is now "startup" like?