I tried 2 different email addresses when subscribing to updates on https://developers.shopify.com/changelog but have not received any notifications since. I was shown a message on the page stating that I would be contacted soon but never received anything after. I checked my Spam folder and did not see anything there from Shopify.
We will be in touch message
This is important to me since I would like to use this email list to be notified of breaking API changes that my company's apps need to adapt to.