Two things line up in Andover to cause this failure more than you'd guess. First, the age of the housing stock - a big share of doors here are original to builds from the early-to-mid 1990s, which puts most torsion springs well past typical service life even on doors that otherwise look fine. A spring doesn't announce it's wearing out; it just snaps one day, usually on the coldest morning of the week.
Second, the climate band this area sits in is rated severe cold, and that's not just an inconvenience - it's a mechanical factor. Cold steel is less forgiving under repeated flex, so a spring that's been cycling for 25-30 years tends to give out in January, not July. Add in a few extra cycles a day from an opener that's been compensating for a slightly misaligned track, and the spring works harder than it should for years before it finally lets go.