How The McDonnell Douglas MD-80 Outlasted The Jet Built To Replace It

McDonnell Douglas built the MD-90 to replace the MD-80. The MD-90 was quieter, more fuel-efficient, and fitted with modern high-bypass turbofan engines that the McDonnell Douglas MD-80's noisy, smoky JT8D-200 engines could not match on any engineering metric. It entered service in 1995, and it exited service in June 2020.