Porsche provided flights from Washington, DC, to San Jose, California, and four nights in a hotel so we could attend Rennsport Reunion 7 at Laguna Seca. Ars does not accept paid editorial content. CARMEL-BY-THE-SEA, Calif.—Every few years, Porsche holds a big celebration of its racing heritage at the Laguna Seca racetrack in Monterey, California. Called Rennsport Reunion, it's a big deal, drawing a far bigger attendance than when racing series like IndyCar or IMSA visit. And attendees are a passionate crowd, prepared to wait in line for an hour or more just to visit the official merch store. Rennsport Reunion...