I have always felt that if you need more than 3 developers and 12 months then the software is too big and the scope needs to be cut down. Better a small program

I have always felt that if you need more than 3 developers and 12 months then the software is too big and the scope needs to be cut down. Better a small program that does one thing well than a monolith that does everything badly - why do we never learn from the UNIX philosophy.