You aren't wrong, but if you really are concerned about those sorts of things, you should probably drive a late-model Toyota, not a Delorian.
They stopped making this car in 1983; it is far beyond it's design lifetime already, and was never a particularly reliable car to begin with, from my understanding. Like most classic cars, you probably shouldn't drive it unless you enjoy maintaining it, and are okay with (and carry substantial liability insurance for) a car that is dramatically less reliable and less safe than a modern car. Like most classic cars, you probably shouldn't drive it places where you are likely to die or otherwise suffer dramatically bad consequences if it breaks down. This isn't a criticism of the Delorian specifically as much as it is a truth about early '80s automotive engineering and running vehicles beyond their service life.
Of course, as a society, we've decided that this (tradeof off cool car vs danger) is a reasonable choice to make; we don't force people to buy newer cars because they are safer. Within this context, the addition of a special instrument panel seems to me like it's not adding substantial additional danger to the system.