>>> I don't believe the web is stronger with more rendering engines and more JS runtimes... I think it's weaker
I disagree. I'm happy to see numerous JS engine implementations that embrace a common standard. If you have just one common code base you also have a common set of bugs. Competition is a great way to raise the bar and try out radically different design approaches. Take GCC and LLVM for example - who can argue that friendly competition hasn't helped them both immeasurably? Link Time Optimization, C++14 compliance - choice is a good thing.
I disagree. I'm happy to see numerous JS engine implementations that embrace a common standard. If you have just one common code base you also have a common set of bugs. Competition is a great way to raise the bar and try out radically different design approaches. Take GCC and LLVM for example - who can argue that friendly competition hasn't helped them both immeasurably? Link Time Optimization, C++14 compliance - choice is a good thing.