Having had one and having seen friends with twins, multiples are definitely harder. Yes there are certain economies of scale but I don't think they even come close to balancing up the additional chaos, effort and exhaustion.
(And +1 for sympathy and respect that you've had triplets and are still here to tell the tale).
In fact, my experiences (which contrast the article) are what has enabled me to be here and sane. Before, we were fleeting, disorganized, and didn't plan.
Now everything is regimented and organized and "minimalized". That's how we're sane and fairly happy (it feels like the movie Groundhog Day, often. And you really have to focus on marriage time.).
We're finding our experiences to be much more sane than others, when we talk to other multiples parents. They haven't developed a simple life, and a simple set of regiments.
(And +1 for sympathy and respect that you've had triplets and are still here to tell the tale).