I have developed a MERN web app and API that altogether, probably comes to about 30K lines of code. Now I've written it all by myself and pride myself on how the structure for the code has made it very easy for me to manage on my own.
I'm a self taught developer and have never had a real developer job, so I'm curious: how much code is roughly too much for one person to properly manage? My guess is that after 50k lines my the codebase is going to start to become hard to manage. My question is obviously approximate and anecdotal, just looking to get other opinions and experiences from fellow developers
Note: Specifically talking about navigation through the codebase, not so much the responsibilities (I'm already starting to get overwhelmed by amount of tests I have to catch up on to support the production code lol)