My family are not from the UK, so we ate lots of foods when I was growing up in the 1980s that my friends considered posh - pasta, olives, French/ Italian cheeses, salami, butter not marg, etc
. To me it was always just normal. We also had Viennetta on a regular basis.
As a child I thought en suite bathrooms were posh (not so much now every newbuild house has them!) Ditto utility rooms - my auntie had an ensuite, utility, a sunken bath in her bathroom with steps into it, and a chandelier in her downstairs loo, I loved childhood visits to her house :)