You mean like the mono-filament swords with their blade edge one molecule wide? Those have the same statistics as a regular katana...
Which clearly
are not mono filament, because everything else with a mono edge is -4 AP.
Those same metal alloys are now also available to the master craftsman. Folding is proven to be stronger than a cast/pressed blade. I do agree that there are machines that would be able to created a forged/folded blade, so it could be on the same level of a master craftsman.
Working with modern steels, folding does jack*shit. I'm a materials engineer, I do this for a living. These days, I don't need to fold steel to get the right carbon content. I can buy it, with much greater accuracy. With a good forge, you could pattern weld a blade much better than anything any forgemaster could produce within a day.
Given the vast improvement of materials in shadowrun, not to mention smart software and drones, the only reason you would hand forge something would be for the process of enchanting.
I'll grant you that most mass produced blades are shite, but that;s because they are designed to be cheap and easy to manufacture, not because they are machined.