I believe 9A1 engine was introduced in year 2009 and now on its 10th year and seems very reliable. I searched and cannot find much unless no one cares to post their bad experiences. Does it hold true that 9A1 is the most reliable modern water cooled flat 6 Porsche engine? I love my 2016 981 2.7L Cayman and wants to keep forever but do not want money draining headaches especially on the engine.