The article brushes off growth by suggesting you just open a new office when you've grown. This suggestion lacks understanding of how growth happens. It's rarely an instant doubling of headcount. Most organic growth creeps up.
So let me invade your "dream" office with a bit of tough reality. Everywhere you imagined 3 people, 6 months later, put in 5. Then 4 months later, every available "single quiet" space, replace with a full time desk. Then in 60 days put a few part timers and interns out in common area, permanently. Now hold the line for a couple years while we find affordable space to relocate everyone to.
Your dream space becomes just another overcrowded, noisy envitonment due to the realities of cost and efficiency that drive every business.