That is absolutely an impressive airplane. I wish I could afford one. But if I could, I would probably buy something cheaper, used.
I believe Diesel is the definitely the future of GA, the engines are considerably more efficient than pretty much anything else available that can power an aircraft, and can burn Jet A. 100LL is a relatively small/unimportant market to oil/gas suppliers. If it were made illegal, I doubt if the the energy industry would fight the effort. Reliable/good quality supplies of 100LL are not available in many remote areas of the world where aviation is essential and this is getting worse instead of better. 100LL is considered a "dirty" fuel, because of its considerable lead content. Several groups including the U.S. E.P.A. are pushing to change it or eliminate it. At some point in the future, it will surely be gone.
That said, 100LL is integral to GA and probably will remain so for decades.