How have thousands, nay, millions, of pilots flown their aircraft without AoA indicators....?
To me, it seems a red herring.
Thery're useful for carrier-based aircraft.
They were fitted on Concorde (a somewhat unusual aircraft configuration - and even there, they were on the side of the panel, not inside the primary scan).
Can anybody, and preferably a pilot, comment on the practical use of an AoA indicator ? How would you "fly" it ? How would you train for using it ? In particular during an unrecognised stall at F370 ?