I agree that the reasons are not relevant. But at my last company, a coworker had overly short out of office messages. Examples: “out of office today.” Or “out of office until Monday.” With no additional information about coverage, etc. Those always felt overly curt to me and made me wonder, is this person okay? Was this OOO planned or are they on the verge of a mental breakdown? (It was a very toxic culture so this wasn’t out of the question). I would be curious to hear others perspectives on this. Is too little information just as bad?
There ought to be a word - and perhaps there is, in German - for the mix of feelings that accompanies composing and activating a holiday out-of-office message. There's smugness, of course, and a gratifying sense of laying down one's virtual tools after a horribly long shift. But for many of us, these nice feelings are tempered by the knowledge that in two weeks, refreshed but depressed, we will have to trawl through hundreds of emails, many of which will be conference room notifications for meetings about crises that have passed.

I did something similar the second time I took maternity leave, actually. I didn’t explicitly say, “I will delete all emails,” but instead I shared my backups’ contact info and invited people to contact me again when I was back from leave.
I will return with a glowing tan on [insert date] and respond promptly to all emails. If your request is time sensitive, please email [insert name] at [insert email].