Been there, done that. And, it's terrible. Monolithic things try to do too many things. It's fine if you grow along with it but a few years down the line - a beginner will find it very difficult to get started and manoeuvre around.

Small, composable things are better. If something is popular, it will be forked and maintained. Also, monolithic things tend to slow down over time (in terms of keeping up) as they start accruing so much baggage.