fiat bank payments require a lot of information to be send correctly, for better or for worse. this library conveniently exposes the elements needed to send a payment, as per the most widely used standard available (iso20022)
Depends on what you're optimizing for, how big of a problem not knowing whether someone read your email is to you specifically, and for what kinds of emails/senders this happens.
“In three years Cyberdyne will become the largest supplier of military computer systems. All stealth bombers are upgraded with Cyberdyne computers, becoming fully unmanned. Afterward, they fly with a perfect operational record.”
It doesn't matter what tools and facilities they used, they still designed and produced a web page. They are the ones who chose to use squarespace, and use that template, and be ok with the end result.
It's not like a pizza shop or a hairdresser who never claimed that their very reason for existing and mission and product was accessibility.
Why did they need a WYSIWYG editor to lay out static content in an entirely standard format? That could be done in Markdown, or plain html. These have the advantage of being trivial to handle with accessibility layers.