Information about a fiber optic network will always exist.

What varies is its level of detail and storage medium.

The level of detail can range from knowing approximately where a backbone cable runs to having the complete path, a PON port, passing through cables, poles, boxes, fusions, splitters, subscribers. All of this is geo-referenced and organized in a chained way (who connects to whom, where, how).

The level of detail is often related to the size of a company. View small size companies starting your network from scratch very well documented and seeing large companies go to great lengths to make up for lost time to increase the level of detail in their information taught us that this is much more about maturity than size.

As for storage media, the sky is the limit for creativity, but in the end it all comes down to four major groups:

Mental

We have seen the classic case where a person “knows” the whole network “by heart”.
This would be the best way if this person were always available, had unlimited mental capacity, never made mistakes and never had ambitions to do new and greater things.
If he was always in a good mood it would be an interesting bonus.

Digital

The heyday… in 1990. Having information in digital format really helps a lot. It became so easy and practical to have information in digital format that it ended up creating a mini-chaos.
Multiple systems each with a piece of information and multiple copies of the information each with a different version. The information is available, easy to access, but no longer so reliable precisely because of the ease of creation and dissemination.

Paper

Good old paper. He accepts everything, who doesn't?
It's simple to create and control who can have access. Unfortunately, it is not possible to spread the information when necessary, it is difficult to keep backup copies and when you ask something on paper, it shuts up.

online

Online information systems are where everything that matters to our business is (or where it goes sooner or later).
Always accessible, with instantly and geographically distributed backups, easy to use, with access controls, easy to share (not copy!) information.
But most important of all: able to respond. And not just answer questions that people ask, but questions that other systems ask. And this is important not only for integration between systems, but because of the revolution we are experiencing, where Big Data and Artificial Intelligence will help in our day-to-day business decisions. It's good to be prepared because if this isn't part of your daily life, it will soon.
The level of detail may be debatable, but the storage medium is not. It's just a matter of time before a suitable storage medium is adopted. The bigger it becomes, the more important it becomes, and at the same time the more cumbersome to organize the legacy. But it's a fact. It will need to be done.
So, why delay?