The datafrom other Apple component suppliers cannot be used to draw conclusions about Apple sales because no other supplier has such a large percentage of its sales dependent upon Apple.
If a display from a certain component maker returns poor UX results, OEMs can use that data to pick a different component or a different supplier entirely.
The AMD SeaMicro Freedom Fabric design separates processors, storage, and data center network access from each other within their 10U chassis, so that each component can be replaced and updated on different schedules.