Alexander thought about the details of the two types of banking for a while- trying to figure out which was the best method for the current situation.
Because although might sound like there were a lot of benefits to the interest free banking system, then again, the fact was it was the traditional banks that dominated the global finances, leaving the other to exist only in the barest fringes of the market.
So surely they had to be doing something right.
Now popularity did not necessarily mean better.
And if you asked Alexander why there was such a huge difference in scale between the two, he would frankly admit he had no idea, after all, he was no expert in economics or finance.
But he could make a few educated theories as to why interest free banking was not as popular.
First and foremost, it might be because the theory of interest free banking itself was flawed and reality did not work like that at all.