That’s my practice, too, though I only use it for times I’ll be out for a day or more. Some of the work I do and support can be very time sensitive and it’s really the most efficient use of *everyone’s* time if I spend two minutes before I leave setting up OOO so that they are quickly directed to the right person instead of having to go check my calendar, see I’m out for a week, try to remember who it is that’s my backup, etc.
But I also believe there’s meaningful power in the mundane cultural norms we set and practice. Email, for better or worse, makes up a large chunk of how knowledge workers communicate. So much of this communication is muddled by broken email habits and larger anxieties around performing productivity. We’re constantly nervous about asking too much of others or doing too little on behalf of our coworkers. But we’re also stuck in work patterns that force us to communicate constantly and normalize working and demanding things from colleagues at all hours.

If you need immediate assistance during my absence, please contact (Contact Person with email and phone). Upon my return, I will reply to your emails in a timely manner.
“Hi, Sorry I missed your call/text. I’m currently out of the office and will not be back until Feb 2. My colleague [name] has agreed to respond on my behalf, so feel free to forward the message to [phone] if it is urgent. You can otherwise expect a response from me once I return. Thanks for understanding.”