Sheldon’s site was a goldmine for the retro stuff but lacking in more modern aspects and will stay that way now. The best info sites, whatever the subject matter, are usually the result of one man’s total dedication, rather than a conglomeration of other info from multiple sources.
I don’t really need a one site does all source as I like to conduct my own research and its all out there, but typical forum attitude is ‘I can’t be ar*ed to find out myself so I’ll bang up the question and someone will do it for me’.
The result of this is when a question is asked and there are 40 replies probably only 5 will be relevant and useful, 10 will be typical STW responses like ‘grass needs cutting, pebbledash needs sorting, slam the stem, wrong colour, you will die!’. The rest will be a mish mash of uninformed, biased 4th hand information not gleaned from personal experience. So sorting out the wheat from the chaff to compile useful info would be almost impossible.
Must admit that most of my research leads me back to the Park Tool site repair help section, which although biased for their own tools, is written by experts in the field (probably).