What is changing
Repairability is often reduced to whether a device can be opened. Access matters, but a genuinely repairable product also needs replaceable parts, stable interfaces, understandable diagnostics, and software that accepts a repaired component.
Those qualities start long before a repair manual is published. Designers make them possible through fasteners, modular boundaries, spare-part plans, and decisions about which components must remain paired to the original device.
Why it matters
A product that stays useful for longer spreads its manufacturing cost across more years. Owners gain another option between living with a fault and replacing the entire device, while independent technicians can support equipment after the first warranty ends.
Repairability can conflict with thinness, sealing, assembly speed, and short-term component cost. Treating it as an architectural goal makes those trade-offs visible early enough to manage rather than discover after launch.
The signal
Durability is becoming a software and logistics problem as much as a mechanical one. Parts availability, calibration tools, update policies, and documentation determine whether a modular design remains repairable in practice.
The most credible products will publish what can be replaced and support that claim over time. Repair then becomes a normal stage in the product lifecycle instead of an exception that the design barely tolerates.