I think the problem is the needs for the Fun To Drive market and the Driving Appliance market have separated so much that you can't fit both markets into a single model anymore. Through the E46 era (early 2000s) you could have a single car which you would drive to work and which you could take to a track. The E90 (late 2000s), and rapidly increasing into the F30s (2010s), people want so many comfort, automation, and entertainment features in their Driving Appliances that would cause any Fun To Drive buyer to immediately reject the car out of hand. The Driving Appliance market is vastly larger than the Fun To Drive market, so it's clear where you're going to focus the bulk of your effort.

I think we're shortly going to reach a point where driving enthusiasts have to have two vehicles. One to drive on the roads and one to drive for fun. I've already reached that point, myself. I won't own any vehicle newer than the early 2010s unless it is fully self-driving.