Acceleration is physically limited, of course, but changes in acceleration are not, except by how fast you can ramp current to the motors (which is very fast, on the order of milliseconds). If Tesla added a significant artificial limit to rapid changes in acceleration then a 2 second 0 to 60 time would be impossible. There would be a significant delay before regen kicks in when you take your foot off the pedal while you are accelerating. Likewise, no one's head would get thrown back when the driver floors it.
Granted, they added a small delay before regen kicks in but I think this was entirely for passenger and driver comfort. There is certainly no theoretical need for an overall delay in changes to acceleration and I have seen zero evidence for it while driving my car or while watching videos of other people driving and dissecting Teslas. High acceleration and rapid changes in acceleration are hallmarks of EVs and are a big reason why they are so fun to drive.
Humans don't like rapid changes in acceleration, which is called Jerk, but it is not a problem for mechanical parts. The amount of force on a part is proportional to the acceleration, not to the change in acceleration.