Love seeing meaningful stdlib improvements.

I just ran our full suite of a few thousand unit tests with GOEXPERIMENT=jsonv2 and they all passed. (well, one test failed because an error message was changed, but that's on us)

I'm especially a fan of breaking out the syntactic part into into its own jsontext package. It makes a ton of sense, and I could see us implementing a couple parsers on top of that to get better performance where it really matters.

I wish they would take this chance to ditch omitempty in favor of just the newly-added omitzero (which is customizable with IsZero()), to which we'll be switching all our code over Real Soon Now. The two tags are so similar that it takes effort to decide between them.