And even in those cases, it isn't cut-and-dried. They claim "The advantage is that tomorrow, we can fulfill the request for a new type of bond by simply creatin

And even in those cases, it isn't cut-and-dried. They claim "The advantage is that tomorrow, we can fulfill the request for a new type of bond by simply creating a new class, with the single required logic to calculate the value of that new bond." Simply? I'd say that creating a new class is a hell of a lot more work than creating a new elseif branch.