For many roles, of course, the sort of OoO described wouldn’t work. But there are a lot of roles where people would survive just fine letting their requests sit for an extra week before forwarding again. And especially at smaller companies where there they might be pressed for coverage when people are out, I think it’s great to normalise that a job is basically ‘off-line’ for a week or two so that the employee can rest and recharge.
Walk through your office and take a look at your electronics and other potential energy drains. Since you will not be in the office, there is no reason to pay for electricity that you are not using. Make sure that you handle your shutdown properly.

Hello, and thanks for your email! If you’re getting this message, it means I’m taking my annual two-week creative sabbatical—working on personal projects that inspire me, so that I can return to work full of fresh ideas for my clients, like you! I’ll respond to your note once I return to the office on [DATE]. In the meantime, here’s a question: What inspires you? Do that, today.
What was weirder is that it took a couple weeks after covid hit for her to turn the message off – which meant that when the entire company was wfh, we would still get an fyi message from her that she was also working from home.