buffet, buzz and "touch"
@ RGB....
The discussion of buffet and other sensory inputs while flying a plane is very germane to this group, many who are flying to this day.
Despite all the "protections", "limits", pushers/shakers, audio warnings, etc., there is no substitute for "feeling the plane". Doze will take exception and defend the 'bus system and others, while disregarding basic airmanship and "touch" ( just poking a barb at you, Doze). I gotta tellya that if you feel something you have not felt on your thousands of hours monitoring the AP or flight director or....., that you have failed to consider the plane is not acting as it should given your control inputs or those of Otto or the cosmic FBW control laws or...
The high-speed indications for sub-sonic designs usually involve a high frequency "buzz" or vibration. You may also have aileron reversal, but this is hidden when piloting a FBW system because the system is trying to compensate and you are not directly controlling surface position, but only commanding a roll rate or pitch rate or gee. And as Doze has pointed out, we have not had direct feedback to the yoke/stick since the early 1950's for most planes using hydraulic control systems.
The high AoA/pre-stall buffet is at a much lower frequency than high-speed buzz, like 20 hz or lower. It's a "shake". Ask Retired, as his jet had a super shake, rattle and roll when getting to the edge of the envelope. The later Double Uglies had slats and much reduced buffet, but it was still there. We also had uncommanded roll when the jet was at its limits, and use of aileron was not advised due to adverse yaw and other aerodynamic phenomena. The standard procedure was to lock the stick between your knees and use rudder for roll. this technique works for the old fighters and even Cessna 150's.
The point of our discussion has to do with airmanship and knowing your plane, and it's limits/characteristics. This aspect of our discussion for two years is extremely germane to the incident and will hopefully be emphasized in training and qualification of the crews and the jet.