The other side of it is forced obsolescence where new OS makes your existing hardware slower. So I wouldn't upgrade my phone beyond iOS18.x purely for performance reasons but if there's a killer feature in a new iPhone I would still consider buying it because its hardware was built to handle the new effects and extra ram it needs.
The other side of it is forced obsolescence where new OS makes your existing hardware slower. So I wouldn't upgrade my phone beyond iOS18.x purely for performance reasons but if there's a killer feature in a new iPhone I would still consider buying it because its hardware was built to handle the new effects and extra ram it needs.