I noticed on a newer Imac that the .JPG designations weren't used for users

For example, when I took a picture with the camera built into my wife's Imac by going into the application "Photo Booth" so she could take a picture of her puppy for an email to send with her computer I noticed that instead of saying something like something.jpg it said something more like "picture taken February 3rd, 2020 at the time to the minute". So, since it would be very unlikely or impossible to take another picture that same minute and time and date it could be used instead of sometitle.jpg

This made a lot of sense to me for people who might not understand that  .jpg is a jpeg designation of a digital picture in a certain format. It still would be likely a jpeg because it is a standard usage for a digital picture by now. But, for people who don't need to necessarily know that "picture taken on a specific date and time" can be used at least until the user wants to change the name to something else.