iOS 16 will allow you to unsend and edit sent messages with some limitations
Unsurprisingly, the feature will not work cross-platform
Yahoo! Messenger was never the most popular, but for many years it was close enough to keep trying, introducing many messaging features years before they became the norm.
It was the late 90s, social media platforms like Facebook didn't yet exist, texting was in its infancy, email was very popular, instant messaging was up for the taking and Microsoft took notice.
Using end-to-end encrypted messaging services can make this data inaccessible to third parties and protection from bad actors. So the question is, which popular messaging apps use end-to-end encryption?