It's a very valid point - it doesn't take a genius to figure out competition drives development, while having a market monopoly affords you a great position of "extortion" in regards to your customers (developers). If there was only one solution from only one company, it would literally be their way - and that's it.
Then again, this is why we first develop web standards or markup languages (e.g. HTML, XHTML, XML) in the first place ;)