It's been brought to my attention that some readers have been replying to my posts directly (via email)—but because of my original Substack settings, I haven't actually been receiving these messages. Sorry everyone!
I believe the issue is now fixed, and I will see emails sent to elbow@substack.com going forward.
As far as I can tell, all previous replies sent to this address are lost to the ether, so if there are any messages you want me to see (even belatedly), feel free to resend :).