It's wild to think how efficient Internet services were prior to AI. The most expensive thing would probably have been something like encoding video. Now you've a substantial portion of a rack dedicated to a user in the case of something like fable
JBIG2 does glyph binning, as you say not exactly OCR, but similar. So chunks of the image that look sufficiently similar get replaced with a reference to a single instance.
EMT conduit isn't a great support material if you're handling human weight loads. The picture on the front page showing off the strength is visibly bending. It's kind of an awkward load profile, lower weight like an awning you're probably using ABS, higher weight you're using 1 1/4" system like steeltek or keeklamp