As I was going through reviews, I've something to mention on "What is the timeframe of the events and announcements discussed in the blog post, and does it include reference to similar projects?"
As I've mentioned, there is very less scope for any new features so timeframe is NA. Moreover, as I've mentioned in code and comparison with 'Object.freeze()' and normal access of object's internal properties, I believe it covers the second part.
I would be happy to know if we're expecting something particular so that it can be improved in future posts.
RE: Fast Freeze - Make an object read only in Javascript