This is a great observation about “what matters”, though I imagine it falls on mostly deaf ears here at HN where many of us make success in our careers the destination.

I didn’t immediately see any discussion of deliverability. That’s like the number 1 criteria anyone sending email in production cares about.

Agreed. Our team's background is in deliverability. Our last startup was a deliverability company founded in 2014, grew to ~20,000 paying customers, and sold in 2020 so we know the space very well and have built Anypost around those best practices. Also happy to provide guidance to anyone who needs help with it. I can go into any specifics if interested.