[natpalmer1776]

I’m genuinely curious as to how you acquired knowledge on old glassmaking techniques without also being familiar with modern techniques.

[ajb]

It's fairly common to see old techniques demonstrated, as those are the ones practical on an artisanal scale. I would guess the modern techniques are practiced in fewer locations, although obviously they account for the vast majority of glass production. But I'd have thought a pool of molten metal is not the kind of thing a small workshop can just keep around .