Trello is not for knowledge bases, in my opinion. It's a transient list of stuff that needs attention or for memos, but it does not feel right for long-term storage of documentation or knowledge. A card can easily be edited, moved to a place it's hard to find, or deleted, and that's wrong for knowledge bases.
For knowledge bases and documentation, I would look for something more structured and built for writing and sharing. Confluence for example.
If you had to thrive a new habit during a lockdown, what would it be? Trello
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