The Pilatus PC-12 single-engine turboprop has been a popular aircraft in that category since it entered service in 1994, with nearly 1,300 examples delivered worldwide to date. To celebrate the plane’s 20th anniversary, the Swiss company is offering a slate of new features for the Pilatus PC-12 NG (for “next generation”) variant, which was introduced in 2008 and was named to Robb Report’s Best of the Best list in 2013. Pilatus says that the new upgrades aim to make the most of new technologies and respond to r…