Chakra seems decent too. And aren't V8 and Chakra both open source? Does Google improving V8 increase the size of their moat? V8 improvements also benefit Node

Chakra seems decent too. And aren't V8 and Chakra both open source? Does Google improving V8 increase the size of their moat? V8 improvements also benefit NodeJS, and they also contribute to it, I think. I use both Chrome and NodeJS and will take any speed improvements they make.