I still have all my LEGO sets dating back to when I was young. And I’ve bought a lot over th years. Most of them are packed away in the closet of the office, though. And the real old sets are hopelessly unusable as sets since pieces are missing and instructions are missing. But I have a big tub off all the “miscellaneous” bricks for building whatever.
One of these days when Sydney is older the sets will be put together (not all of them - I have too many for the house to hold) and on display again.