Thanks for covering this Jeff! I'm really excited about the changes to legacy caching as it's powerful but because of the way it was implemented it was hobbled. We have to come up with a better name for it though. WP Cache isn't even around any more.

I always find it weird when I'm referred to by my surname in an article, but thankfully it hasn't happened much.
Could you edit the post to say "Ó Caoimh" rather than "Caoimh" as the Ó bit is also part of the surname? TIA!