Even with the popularity of web-based services like Gmail, many still prefer a desktop app to pull in multiple email addresses, use desktop plugins, and have a more native Mac experience. Signing up for almost any service on the Internet requires an email address, so it’s a universal digital identifier.
Signing into iCloud (and email) is one of my first tasks when setting up a new Mac. Despite all the new messaging services, project management tools, and chat-based ecosystems, email remains essential.