Even then, I can do the plugs, oil/filters and tappet adjustments on a OHV V6 in about the same time as the plugs, oil and filters on an Omega V6 simply because they're more maintenance friendly.
The only annoyance with the Omega is having to properly jack the think up to do the oil filter, otherwise its all quick and straightforward to do oil, air filter, pollen filter, fuel filter (another jack up), plugs and so on. Even if some idiot has put a load of LPG gubbins in the way
. Old skool mechanics seem to struggle with it for some reason.
Non standard service tasks on it can be a pain, though. Alternators, starters etc are a bloody faff IMHO.
As to "servicing" a car with full engine management, part of that is looking at live data to check the system is healthy, and not having to compensate for wearing/failing items. But nobody does. Again, because garages/dealers are mostly incompetent and don't understand the systems used.