Technically feasible
Unfortunately since Tesla won't publish the disengagement rates, we need to go by what is available through personal logging of many of us. I want to see improvement in this crowd sourced dashboard, if not my personal log.
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Humans are at about 10,000 miles per accident (similar rate by Waymo). So, we have ways to go .... moreover the rate of improvement is definitely nothing like exponential.
One last thing - we have expected / hoped for accelerated improvement multiple times over the last few years. Even though industry experts have always argued for slow and steady improvement (infact many argue each "9" is more difficult to achieve than the previous one).