I would run screaming from such an organization.
Reality is a messy thing.
We have to accept that we will sometimes play digital archaeologist. That's a good thing! It means that the technology we're studying was successful. So given that, it's better to have out of date documentation than zero documentation, so that we can pick up the trail somewhere.
There were no logs to try and work out which processes needed to launch for it to do its job, causing several days of website downtime (not a simple website - dozens of interconnected services). We ended up taking the phone off the hook because we kept getting calls of "is it fixed yet?"