@ Finding Nemo
Everything will work just fine if everything works as designed and you stay more or less in the normal flight enveloppe..
Extreme turbulence, or updraft, Sensor failure single or multiple, Sensor icing, single or multiple, autopilot desengage, multiple and conflicting warnings going off, pilots over saturation, and it goes downhill fast.
How many cars bang into each other because they are on cruise control?
How many trucks bang into cars because they are on cruise control?
The sensors => Automatic systems => Human interface => Results do not Always live up to its safety increasing expectations.
The more sensors, the more prone the system becomes to conflicting information and ultimately to desengaging or failure.
PS; IMHO for cars and trucks, cruise control should have been banned a long - long time ago.