"Less is so much more."

Now, that is true. Primarily because it gives you more space to accommodate new things as necessary.
And to be honest, at some level, Quantity does matter. However, I think we've all paid too much mind to quantity and forgotten all about quality. That's just something that we all need to realise, that everything is right in its own place. After all, that is what minimalism is all about.
Everything in its place, and only in its place.