I was posting something on a UK forum (Jim's) and thought "I know where I should be posting this if I want answers". So here it is (and yes, I want answers please):
... What I've always fancied doing was some research into American pre-Prohibition Porter (and then making it!). They were still brewing it pre-1920 when it had all but died out in London. And they don't appear to have got very "sophisticated" about their Brown Malt making. By the end of Prohibition they'd forgotten how to make Porter and instead went on to make "keg" pretend lagers that were even worse than the garbage the UK went on to construct (I avoid the word "brew" because that would be lying).
The Americans brew plenty of Porters now, but the historical attempts seem to be of London Porters, not their own? They also have a habit of making them ridiculously fizzy, which they could never have been! But note the Americans do attempt to make authentic Brown Malt for their 19th C. London Porters, but use very primative techniques to do so (compared to 19th C. UK that is). Is this a throwback to the techniques the Americans were using prior to 1920? ...