It would be really beneficial for all manufacturers to start installing Garmin avionics. By working with Garmin on certification for larger aircraft types they would save a fortune and have highly capable systems. Instead they choose to go their own way or pay Rockwell/Honeywell billions on proprietary tech that is so far behind the times. This would be a massive cost and time saving for training pilots and allow the industry to create fit for purpose solutions without worrying about compatibility. What Garmin has done in terms of avionics standardisation is way better than Boeing/Airbus or Rockwell/Honeywell. It's a shame these relationships are politically bound together.