I shared this with @BarrelYew322834. It helped him understand turbulence. I should probably share with the rest of you…
What we have in the simulator is a bit of a Frankenstein. Jetstream windshear effect and windshear rotor effects are poorly depicted and often too quick. Picture a river swollen with spring melt and you can imagine what that transition layer looks like. Now imagine going down that river in a submarine.
Pilots will avoid that boundary layer. It is ok to fly well above, below or in the jetstream but you do not want to subject your passengers to the boundary.
Moderate turbulence is a VERY unnerving experience for passengers and if encountered in a light aircraft at lower altitudes due to mechanical turbulence or storm fronts can leave inexperienced pilots shaken.
Severe turbulence is not something any general aviation casual pilot would ever want to encounter. Note the description… “Occasional loss of control.” I have encountered turbulence in a King Air that revealed years worth of dirt and debris, lost nuts and bolts and numerous pens that were thought lost. The bruising from my shoulder straps and lap belt made me look like a car crash victim.