Either the company was

1. so good at what it did that there were no flaws in their products ... ever

Yeah ... right

2. so bad that it simply never updated any of its products ... meaning there were gaping security holes in them you could drive an eighteen wheeler through

OR

The guy was the kind of employee you want to hang onto come Hell or high water ... because, if he could write code that could cope with any and all future updates to the company's products and/or product-line itself, without further modification, that's the goose that lays golden eggs of QA testing right there and something it could sell in its own right to the entire rest of the World!