I'm not a fan of using Patak's pastes, simply because it goes against how I want to create my dishes. I think that the use of such pastes, regardless of the taste, reduces the stature of those preparing the dish from chef to cook.
Throwing in some Patak's paste is obviously easier in a busy TA, but I don't work in a TA, nor do I ever wish to. So I want to recreate the flavour of the TA from the basic elements, without necessarily using the same ingredients or techniques.
I wouldn't necessarily agree that the curries of yesteryear were better than todays - nor could I disagree. It's all down to personal taste - like music - some people prefer Kylie to Mozart - who is to say who is right!!
What I would say about Sam's theory on why the curries of yesteryear taste better than todays - remember, Sam is a TA cook, and seems like a decent enough guy, but he isn't an evolutionary biologist - his thoughts shouldn't be taken as fact.