This is a service-area pattern, not a one-house problem. Across the towns we cover near Maplewood - North St. Paul, Little Canada, Vadnais Heights, Oakdale, and the rest out to Lake Elmo and Mounds View - the housing stock skews the same way: built mostly in the 1950-2002 window, concentrated in the 1960s and 70s, sitting in the same cold-moderate climate band. That combination is exactly what shortens roller life. Original hardware from that era wasn't built with the sealed, self-lubricating bearings that hold up to decades of Minnesota winters, and a lot of it has never been upgraded.
The pattern repeats because nobody replaces a roller until it fails, and by the time it fails it's usually been dragging on its neighbors for months. In a newer-build area with fewer decades of freeze-thaw cycling on original parts, you'd see fewer of these calls. Here, with over 100,000 owner-occupied houses across the service area built mostly in that same window, roller wear is one of the most common reasons a door stops moving smoothly - more common than spring failure in our call volume, even if it gets less attention.