Maybe it’s not regional either, but in my family’s house (where I grew up), and also with my oldest sister, nobody does that as far as I know. They all probably wear their slippers at home, but sometimes they also walk around the garden with them, or the other way around they also walk around the house with street shoes. I can’t stand that, for me the floor is no longer a comfort zone afterward. Where I walk barefoot / in socks, I don’t want street shoes to have been there before. There are also children playing there, etc.