I find the information on the forum too scattered. The wiki provided some cohesion in some areas, and I remember consulting couple times at some point. I think it is very underutilised and on my eyes that is a fail because I see forum posts in internet era like 'tacit knowledge' and wikis as explicit knowledge. https://en.wikipedia.org/wiki/Tacit_knowledge
. I mean, I can distill good information from a thread, but sometimes it takes to read hundred messages in sequence. Wikis require more commitment from authors, but the resultant information is much more concice and accountable.
I think the real question is "what we want ES to be?". If we want to be a club for people to chat around EV matters, it is ok as it is now. If we want to be a structured reference about EV technology, accessible to newcomers and even being used as a study material, we are miserably failing by not using a wiki.
I really enjoy what ES is now. But imagining a wiki with an entry for every controller, for every motor, for every throttle, every rim or tire, iteratively refined and objectively redacted sounds like a powerful idea to help the DIY EV scene.
There are some success stories, altough much more narrower in knowledge scope, eg: https://zeromanual.com
So, for me it is important, and should be more important every day.