I think the first I learned of transfats was an article in Gourmet magazine.
My aunt lived on a farm in Mississippi her whole life … I watched her make butter from milk from her cows. Later in life, no more cows, she bought margarine from the local store. I thought: how could she eat margarine after eating that delicious butter all her life.
I don’t remember any connection with healthiness! I don’t recall seeing butter in any kitchens (outer boroughs NYC sixties and seventies) until I moved away and was an adult.
It was £3.50 for the 250 gram block. To me, it’s been a treat having it on sourdough toast sometimes with honey on top. But that might be because my husband buys Lurpak Danish spread (butter mixed with rapeseed oil) as our everyday butter. I use supermarket own brand non-fancy salted butter for baking.