...I think I used to be far more concerned with the ideal pressure when I was running narrower tyres, now I have nothing under 40mm I'm checking less often, maybe I've just become lazy!
For me, if it is a long ride, I am more likely to top up the tires.
I should have worded that better. I top up the tyres just as often, what i don't often bother with is then checking the pressures with the digital gauge.
I am sure that at some point in time for some special reason, I checked a tire pressure after disconnecting the pump. But that would have been years ago. And if I did that, it would have been to try to compare a handheld gauge against a pump gauge.
If my bike tire pressure is under inflated by 10 percent, to me that is good enough. Thus, I do not get too concerned about gauge precision on bike tires.
My car, if I am going to do a long trip, I check and want to get the right pressure at the start. But then I am driving high speed, thus it becomes a safety issue.