Shoes off was never a thing in any of our family when I was a child and we’ve never done it. (Dare I add that my folks thought it a decidedly lower-class thing?)
Obviously if shoes are very wet or muddy people take them off anyway though.
I don’t much like being asked to take shoes off but of course will do so if people ask, but my feet do tend to feel cold if I don’t have socks on, and no, I don’t want anyone else’s old slippers on my bare feet, thank you.
An ex colleague has virtually white carpet right through so I can understand her insistence, but then I find it hard to understand why anyone would choose white carpet.
I have a Vax and give them a good wash now and then but our carpets are pretty ancient now, plus the moths have been at them, but I won’t replace them until youngest Gdc - 15 months - is past the ultra-messy stage.