...the aviation industry did not consider temporary loss of airspeed indication to be a significant threat
Actually I don't remember the specifics. Could you dig the references up for me?
January 1999: The BFU recommends changing certification standards Pitot probes
(Annex 13).
December 2002: The FAA mandates the replacement of the Rosemount probe probes
Goodrich and Thales AA indicating the possibility of leaving the flight domain and that is the answer to an "unsafe condition" (Annex 39)
January 2005: Thales launches the project "ADELINE" (Appendix 5). Actual air data equipment is Composed of a wide number of individual probes and pressure sensors. This equipment Delivers vital parameters
for the safety of the aircraft's flight:
such as air speed, angle of attack and altitude. The loss of these
data can cause aircraft crashes Especially in case of probe icing.