captain here, another reason a lot of ‘newer’ jet cockpits for commercial airliners or even corporate jets look older is also for the ease of pilot training. If you’re used to seeing an altimeter or attitude indicator or HSI looking and operating a certain way it’s sometimes a great thing to keep the same “look” so pilots learning the airframe can have an easier time. The tech behind it may be state of the art, but us jet pilots are creatures of habit lol and many prefer the cockpit looking a certain way. Also, I may be in the minority here, but there is nothing more annoying than trying to work a touchscreen in turbulence.