Yes, we do now have far better onboard sensor suites and logging than in decades past.<p>And this can provide incredible amounts of information, and get us closer to the source of issues much faster.   Many times, it makes the issue immediately obvious and documented.<p>HOWEVER!  Do NOT make assumptions and fool yourself into thinking this is a cure-all.  There are many problems that, while the logged sensor data narrows it down and provides clues, it can sometimes either not provide the critical clues, or can even be misleading.  Yes, sometimes adding more sensors focused on the issue may help, but not always.<p>Sometimes it is just down to the hard work of finding the peculiar circumstances and interactions that cause previously unknown failure modes.<p>Been there, done that (UAV &amp; motorsport systems), seen lots of very smart &amp; experienced engineers stumped for way longer than you&#x27;d expect.