St. Louis Park sits inside a cold-climate band with real winter severity, and that matters for track hardware specifically. Steel track and steel brackets contract in cold and expand in heat every single year, and on a house built around 1965 that's close to sixty annual cycles of movement working the same bolt holes. Wood jambs dry out and shrink over that many decades too, so the screws holding the bracket to the jamb have less grip than they did the day they went in. That's a different failure path than you'd get on newer construction with engineered framing and shimmed brackets.
The median household income here runs around $100,250, noticeably above the roughly $96,224 median across the wider service area, and that tends to show up as more owners catching this early - fixing a loose bracket before it becomes an off-track emergency - rather than running hardware to total failure. Still, original track on a house this age is original track, and it doesn't know what the income figures are.