Why do Stack instruments still have analogue displays?
Stack believe that an analogue display is still superior in imparting some data quickly and accurately. The human brain can process information from analog displays far quicker than digital displays. An analogue display can tell you at a glance WHERE a value is, a digital display can only tell you WHAT the value is. This is why they are still used in cars and aircraft, even though the underlying information feed is more often than not digital.
Stack do include digital displays in our intelligent tachometers and in our dash displays where information is simultaneously displayed on a large character LCD readout. In the end, user preference is key.