The Dornier 328JET took to the sky 26 years ago in 1998. Among the world's most intriguing aircraft, its tiny size – it only holds 30 to 33 passengers – means it has poor economics and has never been popular. According to ch-aviation, 110 were built, with the same source showing that fewer than 20 are in active service globally in many roles. It's much rarer in a scheduled airline role.