If updating frequently is good, why is TENS, the distro recommended to US military staff abroad, 10 months out of date?

Here is a distro recommended to US military staff abroad, to boot live on computers they do not own such as at cafes.

https://distrowatch.com/table.php?distribution=tens

There is no automatic update as far as I can see. You just download the latest version of the distro and burn it to a CD or USB flash drive. But the last version is 10 months old and the one before is 5 months older.

Is it possible they consider immediate updates a bad idea?