Sounds like you'd recommend going with a vendor like Sage? Or that IC Group should use an accounting system which doesn't match their business requirements?
Not necessarily, just that forward planning can be a useful thing. "We'll only ever trade in USD" is a phrase I've heard many times, and rarely does it hold true. Time has a habit of changing plans, and baking in support for possible future directions from the outset is a good way of hedging risk.
That's risk avoidance, when the smart money's on risk management. You might need to travel offroad, or transport a ton of cargo, or get from A to B in 60 seconds, but you don't own a motorcross bike, ¾ ton truck, or sports car right now: you wait until circumstances change and rent, borrow, or buy the vehicle which meets your needs and budget.
Although now you are arguing that they should have designed the system with the possibility of multiple currencies, rather that actually supporting them. There's not enough information in the article to determine if support for multiple currencies is possible or not, so I guess you read the source?
