Question, the original IPA was served out of a barrel in India, correct? I'm a History major from way back when and I'm the 1900s and even today refrigeration is not all that common in India....What are your 2 cents?
You don't know your history - or your engineering, or what a Brit will do for a cold drink! ;-/
India has a long history of passive cooling -
this modern building builds on those ancient techniques - and evaporative cooling was used to make ice locally in the early days of the Raj - by the tonne. But this wasn't very efficient, and a
huge trade in ice from Norway and New England developed in the early 19th century, peaking at 146,000 tonnes to India alone in 1856, before the British government built their own ice plants and then commercial ice plants started trading in the 1870s.
After all, the Raj was the home of the gin and tonic, and you can't have a G&T without ice! But the beer would also have been served at the right temperature, at least in officers' messes and other government buildings - obviously a soldier on the march doesn't have the same luxury, but that would also be true today.
As for "It would not have been as pure as an IPA today....hops have been selectively grown for centuries since then" - WTF? Export beers like IPA generally used Goldings - the same variety you can get today, and just as "pure" as Citra or whatever. Sourness was long-recognised as a fault rather than something to be tolerated - you see barrels of porter being rejected for sourness in the 18th century - and the whole point of 100+ IBU beers was to keep acetobacter at bay. And any Brett was more likely to be
claussenii rather than
bruxellensis, so probably wasn't overtly "Bretty" like a Belgian beer.
Just as people tend to romanticise how good the past was, they also underestimate how technologically sophisticated things were in the past - particularly in Victorian Britain. These beers were being made on an industrial scale by sophisticated breweries in ruthless competition with each other - there wasn't much room for second-rate beer, and it wasn't as bad as others in this thread have made out.