It depends very much on the circumstances. In most slow GA airplanes (and yes, the Vision jet is a slow plane), one can perceive both the airspeed and the angle

It depends very much on the circumstances. In most slow GA airplanes (and yes, the Vision jet is a slow plane), one can perceive both the airspeed and the angle of attack by the control feel ("mushy" vs "firm"). Many older airplanes (for example the fastest GA piston twin, the Aerostar 601P) did not have even stall indicators. That airplane used to scare the crap out of me during a takeoff on a hot day. Everything had to be done just right ... You mostly need a stall indicator or an AoA during tricky procedures like really short field operations (which in the Aerostar world translates to "just don't"). Jets are a slightly different story however I do not believe the VJ gets fast enough for that to matter.