Anxiety and anxiety

I have been at motor-talk for a long time but I am new here at porsche. since about 1 year I have fulfilled my life and as a summer- & nice weather car I acquired a boxter s first hand with 140,000 km from a dealer. the vehicle was regularly waited until the last inspection (free workshop) of the pz. I had a small inspection carried out in the pz in the early year. if I now read here in the forum how susceptible the engines should be and 140,000 km already on the other side of the pz. n are good and evil and therefore I have to expect every moment with a capirtal motor damage. at 3.2 liters cc and regular maintenance ? should keep forever especially because of porsche or ? are the motors not stable and designed for high running performance ? how is your assessment ? professional founded contributions preferred ! many greetings harti