I had just joined 3D Systems in 1997 and on my first day at work at a trade show I met a person who was setting up a 3D printing facility at an automotive company in Malaysia. He ended up buying two 500mm size machines that were powered by an argon gas laser tube that output a whopping 250mW. Two machines cost $1.4 million dollars. Today you can get a Formlabs system that outputs that power for under $5K!!