I don't know how many of you guys are on-the-side petrol heads, but it's one thing that strikes me with the facebook generation - all the years of lost knowledge when everyone pivoted from car forums to facebook groups.
No longer can you quickly search up 'what's the best gearbox oil to use in my T56'... Oh no. It's an almost-hourly repetition of shitpost threads that contain no useful information for anybody. Need to know what diameter bearing you need? What part # for that o-ring? Good luck. And if you do happen to stumble across the hidden knowledge of a now-defunct forum, you're likely to be met with the next peril - images that are no longer hosted or available to see without the original uploader paying for an image hosting account on photobucket etc.
I feel like all the collective knowledge from the years of 1999 - 2009 is basically lost to the sands of time.