I wonder if anyone ever calculated how much time was wasted producing those messages.
This is how my voicemails to my doctor’s office, my son’s doctor’s office, his daycare, etc. all go. Actually, the few times I leave voicemails beyond that, this is how they go.

Hoo boy, have I got some PTSD from Old Job about out of office autoreplies. Exboss was such a stickler for them and actually enforced her expectations as official policy. Meaning if you didn’t do it to her exact specs, she’d call you back to the office to do it (which no one did) and read you the riot act afterwards while threatening to write you up for insubordination. She demanded them any time that we were away from our desk for longer than 30 minutes and for anything other than a meeting. So training in the conference room down the hall, a work lunch with teammates, leaving an hour early for an appointment, arriving late for an appointment, even working from home, all required OOO alerts.
It's August, so it's the time of the year when many workers' holidays come around and the time of year when setting up an out of office automatic reply is vital to ensuring you can enjoy your summer break in peace.