But is it useful or not?
Ever try to read the voltage on the output side of the instrument voltage regulator?
Would a digital gage be useful?
Would a 0-100 V scale on an analog meter be useful?
How 'bout a 0 to 8 Volt scale?
Again it comes down to what a person is going to use it for. Then sampling rate, readablity, ability to add on to it, will quickly narrow down the hardware which will fit your goals.