Large animals didn’t grow larger because they had become more complicated, they had to become more complicated because they’d grown larger.

These lessons of scale apply equally to organizations. A two-person company doesn’t need an HR department, but a thousand-person one probably does. The processes used by organizations also reflect their scale. If you’ve ever gone from a small to a large company or vice-versa the differences can feel disconcerting, liberating or alien. No-one working for a small start-up or on a small project longs for big-company process or bureaucracy, but yet strangely they often seem to adopt the same tools, infrastructure and architectural patterns of large and successful companies. In doing so they overlook one of the biggest advantages of being small – the ability to keep things simple.

Source: Nature Doesn’t Architect for Scale and Neither Should You · JCooney.NET