A few important facts:
- Technology moves and changes at the speed of light
- A successful online presence must adapt quickly to market changes
- The internet is comprised of niches; and each niche derives from a previous niche
- Online success is largely reliant on the effective delivery of a niche (not applicable to all businesses)
- Creating a custom user experience or having a custom management experience are critical
- Blocked or locked source code cripple all niche customization abilities as they arise
It is simple to see flexibility of online presence, unlimited adaptability and complete open source code are all mandatory to achieve the points noted above.
This is what separates WordPress from the rest.