It's important to remember that the rise in popularity of cylinder vacuums in the UK directly correlates with the increase in popularity of laminate and wood floors. You've only listed best sellers from the 1990's onwards. Remember, up until the early 90's, Hoover were the best seller, renowned for their deep cleaning on carpets but not much good for a hard floor. Uprights mostly dominate the market.
The early 90's saw the fashion of carpet washing. Vax, Hoover, Electrolux and Goblin all offered multi-function cleaners which, when used regularly to wash the carpet, would remove the deep down dirt left behind by straight suction cleaning.
The start of the decline of bulky multi function cleavers and the rise of bagless also marks the start of the hard floor phase.
So, in answer to your question, I think we do care about deep cleaning. But as fashions and styles have changed, so have our vacuum sales. Nobody has deep, wall to wall, shag pile in this country anymore, it's all low pile, hard wearing carpet and hard floors.