[kijin]

> get something running without errors in the logs, for years at a time

This is something you only begin to appreciate if you've been through a couple of economic recessions. Not everybody has money and manpower to keep their website up to date every other month! A well-built app for a typical business should be able to coast along through the lifetime of, say, an Ubuntu LTS release without much effort.

[anonzzzies]

This especially (in our experience) goes for partner-facing LoBs. Like a SaaS for your business partners, clients etc. A large companies might have 1000s of these. We get clients with 'so we have 600 applications and something is wrong with many of them after xyz'. These apps usually don't update ever but they are vital for departmental workflows and they are complex enough not to bin them and rewrite them (especially in these quantities).