I could be completely misunderstanding what is going on, but from reading what didn't make my head explode in this thread and the link, the layman's version is the tension release setting is the force needed to start the travel and the travel distance is how far it goes while at least at that force before it releases, right?
If that is the case, other than the durability/reliability of better made bindings (i.e. higher DIN range tend to have more metal), why do I care if my setting of 7 is on a 4-10 or a 6-18 as long as the Binding Testing Machine states they both release at 7? Isn't 7 on a big spring 7 on a smaller spring?
When you bring your skis, bindings and boots to a shop to have the bindings tested ON A MACHINE, it tells you at what setting your bindings are releasing. So if I bring my 4-10 set at 7 and my 6-18 set at 7, if everything is working properly, they will both release at 7. All I should care about is whether or not they do indeed release at 7. I shouldn't care which one has the bigger spring but if it is accurately calibrated or not.
Then there is travel. Again, there are different travels and yes I should care what the distance is, but I should NOT blame the release value because of a shorter travel. Something I always thought as odd is that people crank the release value up to compensate for (what I believe is) a shorter travel. How many times have people posted about how a binding sucks and they had to crank it up 2 notches when the real issue very well may have been they went from a (making it up) 35 mm travel to a 20mm travel). There recovery time was shortened and they stating it as premature release and blaming the release tension and not the travel.
Anyway, that's how it sits in my head. Please point out where my thinking might have gone astray, especially if you can do it without hardcore math.