FYI The oil pressure gauge in the instrument cluster does not give oil pressure it is a gauge that simply tell that you have oil pressure and should always read in the middle The oil pressure sensor is just like a light switch either its on or off.
I see. So, basically no better or worse than the "idiot" light. Seems it was different back in the day. I drove several vehicles where the electric gauge would change with motor RPM as well as temperature, the latter to a lesser degree once operating temperature was achieved. On cold start-up, especially during winter months the electric gauge would shoot up more than 3/4 to the "H" high side. As the motor/oil heated up the needle would slowly edge back down to the "L" low side. I installed a mechanical oil pressure gauge on several of my autos over the years.
The mechanical gauge always indicated what the electric gauge did, just with numbers/PSI for a more accurate picture of motor OP. On a couple early vehicles I owned the electric gauge indicated very low OP at idle. After installing a mechanical OPG I discovered idle pressure was indeed quite low. As I recall one was something like 8 to 10 PSI and another 12 to 14 PSI. At cruising speed the pressure would be around 25 to 35 PSI.
I had a 1980 Ford Mustang around 1987. The OEM oil pressure gauge in the cluster had 'L" and "H" & between both the word "NORMAL". I had rebuilt the motor shortly after purchasing the vehicle. After I rebuilt the motor the oil pressure never fell below 3/4 in the "NORMAL" range but prior to rebuilding (installed a reman crank with new bearings, new cam shaft & bushings, etc) the OP barely made it into the "NORMAL" range.
So what you're saying is the modern electric/factory gauges are not like past gauges. The gauge in my expy goes further than half way. It goes nearly, but not quite 3/4 to the high side but based on you're statement that means nothing regarding actual OP. If that's the case I don't care for the current set up. In reality though, I don't trust any electric oil sending unit like I do a mechanical unit.