Thanks for the feedback! I was thinking of writing a blog post on V8's internal string representations and conversion as the next one in this series.

As for the monomorphism topic, it's very hard to add something valuable on top of this blog post from Vyacheslav Egorov: https://mrale.ph/blog/2015/01/11/whats-up-with-monomorphism.html

Do you see any missing details in Vyacheslav's post?