Cumulative Hours Meter

Can't say that it would be enormously useful, but I would like to see a cumulative-hours-on meter added to SmartSDR--or perhaps same coupled with an hours-this-session meter.  Over the past 50+ years, I have added mechanical cumulative hours meters as adjuncts to most of my rigs (often made with surplus components from the Mendalson's tent at the Dayton Hamvention).  I have kept logs of the readings when components were replaced, when the rig was serviced, etc.  It also gave me a sense of the time I was devoting to amateur radio and the value I was extracting from my radios.  Originally got the idea from engine time meters when I was training for the private pilot practical exam.  I published a QST "hint or kink" about my first meter roughly 40 years ago.