p.s.
In case someone wants to argue that regulatory bureaucracy is not the problem:
Title 14: Aeronautics and Space
CHAPTER I: FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED)
SUBCHAPTER G: AIR CARRIERS AND OPERATORS FOR COMPENSATION OR HIRE: CERTIFICATION AND OPERATIONS
PART 125: CERTIFICATION AND OPERATIONS: AIRPLANES HAVING A SEATING CAPACITY OF 20 OR MORE PASSENGERS OR A MAXIMUM PAYLOAD CAPACITY OF 6,000 POUNDS OR MORE; AND RULES GOVERNING PERSONS ON BOARD SUCH AIRCRAFT
Subpart F: Instrument and Equipment Requirements
125.205 - Equipment requirements: Airplanes under IFR.
No person may operate an airplane under IFR unless it has:
(a) A vertical speed indicator;
(b) A free-air temperature indicator;
(c) A heated pitot tube for each airspeed indicator;
(d) A power failure warning device or vacuum indicator to show the power available for gyroscopic instruments from each power source;
Meaning - nobody is allowed to use anything other than the archaic pitot tubes for airspeed reading and gyroscopic instruments while we for years have solid-state sensors that are more than 10 times more accurate than gyroscopic instruments or pitot tubes.