The title says it all. I would say that time frame was when Tesla switched into a car company I wouldn't necessarily call premium. Pressure from Model 3 manufacturing and cost I assume. Many if not all decisions since then have been to cut costs, even if they claim green credentials. No more real leather, no grey interior, no opening panoramic roof, less colors, no radar, and the list goes on. I am happy with my 2016 90D and I am still holding on to it because it provides good value, Free everything etc. But I doubt it highly its replacement will be a Tesla, we'll see. For now I will hold on to it a couple more years.