Out of date charts on Airnav

Viperdoc writes:
However, on downloading and printing a chart from the Airnav website, I
noticed that they were from the last cycle, so might not be valid or
current(??)

Mxsmanic wrote:
You're not supposed to use charts from AirNav for navigation.

The Flight Guide says "not for navigation" too, but their airport
diagrams, readily obvious illustrations of reporting points, traffic
patterns and other details make it a very valuable cockpit resource, as
long as you keep it updated, IMO. If we eliminated all the stuff that
says "not for navigation", we'd have a lot less useful info at our
fingertips.