Comment by mhotchen

100% I believe this is the most common pitfall that I've seen. Long-term thinking is an acquired skill when it comes to engineering good solutions. Unfortunately after (sometimes) years of over-engineering solutions in your career, the "a-ha" is that you definitely wasted your time and worse: often made iteration based on actual requirements slower by creating flexibility in one preconceived way, whilst adding rigidity in many others. KISS gets you real far