I've worked on financial systems still running on mainframes from the 80s. The Y2K compatibility commit messages are there in the logs. Airline reservation sys

I've worked on financial systems still running on mainframes from the 80s. The Y2K compatibility commit messages are there in the logs. Airline reservation systems run on software written in the 50s and 60s Your views on evergreen this and disposable up to date that are very naive. Embedded systems and business systems live for a VERY long time.