+1
To take that even further. In South Florida where I do all of my diving, I am on the boats with a number of casual, vacationing divers pretty much every trip. Most of them have no clue what tank they are diving ... aluminum or steel. Most seem to have no clue there are even two different materials tanks are made out of, different capacities of cylinder, and that the buoyancy characteristics of the tank influences how much lead they will need.
The market for personal cylinders is really for local divers and those that frequently drive-to-dive vs. primarily fly-to-dive. That is a very small group compared to the number of certified divers that occasionally dive while on vacation.