Originally Posted by
FullWings
No. Because of certification requirements, cost, problems with commonality and the time between design freeze and the first customer getting their hands on it.
Part 25 certification requirements are the primary driver - any important flight deck instrumentation is considered to be flight critical, which means it's Design Assurance Level (DAL) A or B. It takes a long time and costs a fortune to certify DAL A or B hardware
and software. Further, any change to hardware means re-validating the software, and visa/versa. As a result, once avionics are certified, there is huge incentive to leave well enough alone unless absolutely necessary. Parts obsolescence is a huge, on-going problem with commercial aircraft avionics due to the rapid changes in the consumer electronics - it's often not even possible to manufacture some of the electronic bits from ten or twenty years ago because the changes in technology. Back in the 1980s, most of the electronics were mil-spec, specially manufactured for purpose - now days nearly everything is "Commercial Off The Shelf (COTS) (although typically screened to a higher standard than the stuff in your phone). The manufactures simply are not interesting in making a few thousand parts for aviation when they are producing parts in the millions for commercial applications, so we have to use what they are already making.