Once I was aware of Colvin's, Mark's Std Engineering, and the others, especially printed by machinery manufacturers [DoAll, Warner & Swazey, and yes even Bridgeport], began pursuit of those as well.
Strict conventions support things like interchangeability, as results, lesser so than the means. Like the internet and personal computing, they can't respond to innovation instantaneously, which in consideration isn't so bad.
Once it makes it into Machinery Handbook, its gospel. Solid, repeatable and extends as far as the reader base. Not unlike HMT.net at it's level; 15,000 some-odd deep.
And to C-Bag's whoda thunk, I repeat. Regardless the level of involvement, this is far more than just a hobby. Matters not whether you produce income or satisfaction. Perhaps those who do so for satisfaction are the real practitioners.