I'll be more direct at saying what the post can't say:

- Historically the V8 team simply did not care about node, and would introduce breaking changes that would come as a surprise to node core

- It's better now, and V8 folk are on one of the steering committees for node. Also Google Compute Engine team needs node to work so also brings in a real business case for the V8 team to care about node

- Chakra is also a pretty good contingency plan.