That's right. My E-Tec also has a telemetry link that uploads data to a PC when it's being looked at by the engineers. As for personal logs, I used to keep one when I had a yacht but got bored after a while and gave up. I guess that's why they invented video cameras.
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On the optimax we get a print out each year included with the bill (but no bill this year cheers Barrus) from when it is serviced. It shows the time spent at each band of revs, fuel used, total hours of use and all sorts of other mindless info. The most interesting part i found was the first one. The time spent at different revs. Most commonly we are at almost idle, or at revs of 3800,3900 (peak) 4000 and 4100. These are obviously cruising speeds. Secondarily it was interesting to see just how long we had spent at almost WOT
Back on topic, I spent many years logging all the dives I had made, and those log books did no more than sit in a drawer most of the time. To be honest I found writing them a pita.
For me the RIB is all about enjoyment, and if that stopped being the case I would sell it. So for me - log books no thanks, and if that screws up any future qualification efforts, I will cross that bridge when I come to it.