We all have that one colleague that uses “reply all” way too often. I made the following video to help that person. By the way, if you can’t think of who needs to watch this video, it might be you.
There’s nothing wrong with using “reply all” when it’s necessary, but it’s usually not necessary. We all have plenty of email and don’t need twenty more messages saying, “yes” or “ok” or “I can’t make it because my sister’s brother-in-law is having an in-grown toenail removed that day.”