I disagree with this. I find the “range” to be a useful data point especially as the fuel level is getting low. As long as you have a general, realistic understanding of what it’s telling you. I don’t know specifically how the number is calculated, but my assumption is that it has got to be based on some sort of moving average of fuel consumption. With this I can keep an eye on the number and allow my human, good-at-pattern-recognition brain to do its thing and use it as an input to whatever decision I need to make. Personally, I find it a slightly better source of information than a simple fuel gauge that’s getting low.