Commercial production started over 130 years ago, and the gas auto has saturated its niche beyond what I suspect was thought possible even just 70 years ago. These cases are textbook examples of how to displace an entrenched technology: provide a clearly superior and standardized alternative that can be used in parallel with existing solutions until those existing solutions wither away. The alternative has to be able to be used in parallel with the consumer’s existing solution (and with existing embedded infrastructure/standards) rather than require the consumer to abandon his/her current solution and all the financial, emotional, and intellectual investment in that solution.