Why is there no more digital dashboards and gauges on cars nowadays?

Most dashboards now ARE electronic, it's just that the displays are analog. Analog gauges are MUCH easier to read at a glance, and do a much better job of putting information in perspective, that's why they are preferred. A gauge with the needle in a normal zone can be interpreted much more quickly by the average person than a readout that says "40" or "14.2", because you don't have to know what range that particular value is supposed to be in, you just know it's OK. You may think a digital display is cool, but the average person finds them confusing, and they draw your eye off the road for too much time to interpret them. They are also more expensive to make, and impossible to fix if one segment or digit fails.