The Lexus LFA was like a shooting star—bright and beautiful, but it burned out quickly. Production lasted just two years, from 2010 to 2012, with a scant 500 units finding homes worldwide. Since then, fans have been begging Lexus to bring back its beloved LFA. Well, today’s the day. This is the new Lexus LFA Concept, the first Lexus to wear an LFA badge since 2012. Unfortunately, it’s not ready for production, as the word “concept” indicates. Even more disappointing is what’s...