KTM is the obvious assembly line system to wonder about, since they have so many models and such constant evolution for so few units.
Compare that to Suzuki, who has made one gasket change to the DR650 in twenty years, or whatever!
I think maybe the trials mfrs are very good at doing things the old way, with careful attention by a few technicians to produce a few units. Amazing that they exist at all, never mind six (?) current mfrs producing a half-dozen models each.
That said, I wonder if American Beta is trying a new scheme, which if it sells will shortly be of interest to the factory. Farkles can have a better margin, if you can sell most of the lot...