Replacement becomes mandatory when drum assemblies exceed 50-percent of original appliance value

https://urgentappliancerepairgoldriver.yousher.com/extending-an-aging-appliance-decade-past-its-design-life-creates-hidden-repair-expenses

The drum assembly is the most expensive component to replace on a dryer because it houses the internal structure that must meet strict load-bearing and thermal safety limits set by manufacturers and regulatory bodies