A roller job in a house built around 2001 is a different job than one in a house built in 1978. Builder-grade rollers from that era were almost always nylon sleeves over a stamped steel stem, sized for a lighter door than a lot of homeowners are now running after upgrading to insulated panels. Twenty-plus years of cycles wears the nylon down to a flat spot, and you start hearing the thump on every open and close before anything actually breaks.
The climate here sits in the mild-with-occasional-freeze band, which isn't the hard freeze-thaw cycle that cracks nylon in colder states, but it's enough that a handful of cold mornings a year make brittle nylon rollers more likely to chip at the edge rather than just wear smooth. Steel rollers don't have that failure mode, which is part of why we see more owners here asking about steel-and-bearing upgrades than flat nylon-for-nylon swaps, especially on doors that get used multiple times a day.