Digital stuff is cool for the ability to see an exact number, but analog needles are easier to read at a glance. When you're bouncing along a trail, you just want to see the oil pressure gauge pointing in the right general direction. 40 PSI swings the needle to a certain angle, and you really aren't concerned whether it's 40 PSI or 42 PSI.
With digital readouts, it takes your brain longer to decode the info. I.e., is that 40 PSI or 04 PSI?
Take a look at a NASCAR dash sometime. No digital stuff there... The human brain is an analog device and decodes info from other analog devices very well. The NASCAR folks even rotate each gauge to its own position, so that when everything is going well, then ALL of the needles are pointing in the same direction. All the driver then needs to do is quickly glance at the dash. If one needle is out of its preferred range, it will be evident instantly, without the driver needing to look at the numbers on the gauge face.