[bl4ckm0r3]

you don't need maintenance to remain in production, you need maintenance to reduce the tech debt in the infrastructure you decided to use (code, frameworks, third party libraries, security issues). Even just vanilla languages get upgraded every X months/years etc. Not maintaining the code is just a bad gift you are giving to your (or someone's) future. I have been in upgrades from perfectly working software written in an older (almost 4) version of java that was needed to add new features and it took a hell of a time and I have never seen it working at the end. I don't think it's a safe choice to "let it be" when it comes to software.