Beyond the 50 Percent Threshold Lies True Replacement Economics for Failing Units
https://telegra.ph/Before-Your-Microwave-Fails-Warranty-Registration-and-Coverage-Limits-Shape-Repair-Economics-08-13
Most refrigerators last 10 to 15 years, but the real replacement decision hinges on the sunk-cost risk of over-repairing past the 50% rule: once repair costs exceed half the price of a new unit, continued repairs expose you to repeat-failure liability