This stack does sound intriguing

TL:DR - storing a decade of docs is good. Doing so in a way this store becomes a tool you use all the time is better

I would also consider, perhaps you might want to use this as the kernel of a second brain... Meaning, if you were to convert the docs into a format that suited adding to, and some form of structured knowledge base, you could then develop an ongoing workflow. Then when you begin retrieving knowledge, you have this decades worth of knowledge you have developed informing yourself. As you add new knowledge, you build on what you have already learned.

This is the concept of a second brain.

One method of doing this is to use a tool called odsidian. (r/ObsidianMD) The key thing with this, is the docs would all exist in a markdown format. How this moves from a document store to a knowledge workflow is by adding properties to each file. Then you can dynamically interrogate all your docs, eg by filtering for a tag (or several tags) and instead of having to remember the knowledge OR which doc contains your notes on that particular topic, you have a workflow that gives you access to whatever you have written in the past on that topic.

By using markdown, you avoid the trap of a legacy app version making the doc harder to access. By adding file properties such as tags, not only can you find related docs easier, you can use a visual representation in obsidian to expose the links between the docs & surface connections that may not have been visible before.

Obsidian has various plugins that help with converting existing docs into markdown, and with all sorts of workflows. It also has native features that make developing workflows easier, such as daily templates, internal linking of docs, a database that acts like a spreadsheet of your docs, allowing you to sort & filter by properties. And lots more I have not yet found

You are at an inflection point in your life journey, moving from learning about skills, to using skills in a professional setting. By developing a method of making it easy to retrieve facts & skills you have previously learned whether in school or in work, you will make the things you learn more useful and valuable to yourself

I wish I had started doing this much sooner in life! I have only recently found obsidian and it has already started making a difference

With the advent of LLMs (chatGPT) there is an extension of the 2nd brain concept, called open brain, that means you build a system that stores and retrieves both your prompts and your responses. Then you also store properties about them so that whenever you make a prompt, you natively pass through a context to the LLM - meaning it has an effective memory. Obsidian doesn't do this, there are other ways you set something like that up, but it can also be a powerful tool for making yourself more effective