Yes, I still have some. I lived without carpets for some years, but I didn't really make a difference so I decided to put them back.

Maybe it's not the carpets but the flats I lived/live in. Since around that time it started I moved to my first flat in an old building. Since then I moved two times but always to similar flats with the same old wooden floorboards and high ceilings. Maybe it's the brittle stuff between the floorboards that collects the allergens.