> I wish there was a business reason for orgs to care about accessable and machine readable emails.

I hope the upcoming EU Accessibility Act will be enough for many organizations to finally make their emails accessible. I disable images by default in my email client, and some emails are pretty much empty without them, without providing any alternative.

> I wish there was a business reason for orgs to care about accessable and machine readable

Isn’t the whole point of sending emails to get the recipient to read them? If the recipient can’t read them, you wasted that money and captured no value. Possibly negative value because you just reminded the recipient of how annoying your website is. “Oh right, that vendor with the full-page modal that I couldn’t dismiss, or was it the vendor that had a pretty site that turned gray three seconds after loading for not discernible reason and wouldn’t let me click anything after that? I’ll just shop at Amazon next time even though they’re more expensive and vaguely evil.”

I assume most email client support email with both html and txt content. If they don't support html or configured not to display it, the txt version is displayed.

We have a html and txt template for each email we send. It's not exactly double the work, but it's appreciated by some of our customers.

I have my email client configured to display messages as plain text. A large fraction of emails that I receive have a text part that is empty or has some placeholder text. Also, senders often generate the text version by taking the HTML version and just stripping all tags, which means that all links are removed. I wish I could configure my client to ignore the text part completely, and instead to convert the HTML part to plain text, which is what it is doing already if there is no text part.