From a short-term perspective, monocultures seem good for developer
productivity. From the long term perspective, however, monocultures
inevitably lead to stagnation. It is our firm belief that more options in
rendering engines will lead to more innovation and a healthier web ecosystem.
I find this a doubled-edged sword. Monocultures are said to foster a culture of laziness, apathy. This hasn't been the case with WebKit.
Don't get me wrong - competition is healthy. I'm simply thinking of how Jovinder experiences the web.
If you think WebKit hasn't fostered a culture of laziness and apathy among mobile web developers, try browsing the web using Firefox for Android or IE (on Windows Phone) sometime.
I've lost track of the number of times I've had to pretend to be something different (desktop Firefox, default Android, Mobile Safari ...) to make a website usable. Every time I have a fresh Firefox install on Android, the first extension I install is Phony.