The question for most of us is 'What is the real world range of my bike in the conditions I'm most likely to use it in?'.
The availability of zero resist motors means 'no assist' cycling is a reasonable option for many of us on flat tarmac, at least if we aren't in a rush or feeling tired or are physically compromised in some way.
We use the battery on hills, into strong winds, to plow through heavy ground, to boost our speed if we in a rush, to keep our heart rate down or just if our legs are getting tired. Or for the pure fun if it .
But we don't have to use it all the time, and many of us cycling down rivers and along cycle paths for leisure use don't, and that makes our range in real world use significantly more than you would expect from plugging the numbers in. We can literally cycle all day and explore without range anxiety.
That's exactly right, but the problem is that many people browse through these forums as research to help choose a bike that meets their needs. Most of them have no idea of the factors that affect range, so they take any data at face value, which may leave them very disappointed.
Having worked in and observed in many ebike shops, I've seen all the people coming in and asking about range. They nearly always ask about it. I would be looking at some 50 year old with a massive beer gut, wheezing after his fag, asking me how far the bike I recommended could go. When I gave him an honest opinion for his circumstances, I'd get an answer like, "OK, I'l forget it then because the one I've seen on whatever website does 70 miles, which is more than twice as far". Most people just don't get it.
It's fine to talk about how easy to ride a bike is without power and stuff like that, but any mention of range can be very misleading unless you put it in the context of all the qualifying circumstances and parameters, which of course most people don't understand anyway.
Think about the guy that comes on the forum and reads how Eddiepj can flatten his battery in less than 15 miles, then he reads a post from the guy that claims that he gets 50 miles from his Gtech that flies up hills. This is what worries me.