Your first comment is indisputable.
The second is unlikely - if you get your gas bottles from a typical swap system at a service station, they simply remove them from service as they get old, and take your old one regardless of condition . It is very unlikely that you will be given one that nowhere will then take when empty. And with expensive vehicle batteries there will no doubt be greater protection. But unless there is some very dramatic change in the size of batteries (highly unlikely) it will only be fleets doing it anyway, not the average motorist (as you say).