My husband just upgraded his P100D to a "Plaid" so I took the P100D as a hand-me-down instead of us trading it in or selling it. I had been driving a "Volt" and was happy with it.
This is the first car, in my 42 years of driving (I'm 59) that I had to read the manual and "study" the UI before I could use it. And I still have trouble adjusting the temperature, etc, while I'm driving. It's way too confusing. I suppose I'll get used to it, but it's too much time with my eyes away from the road.
If I say anything about this to Tesla "true believers" (or even the folks on Hacker News!) it's always my fault.