I dunno – I think it says more about the writer than the culture. I worked in tech where there were always a handful of people who would do stuff like this, but most people would keep it basic. I just think some people love putting funky or gimmicky twists on rote stuff.
OMG if I got this OOO message I would pee my pants laughing! I think its brilliant! (But perhaps thats my weirdness popping out again… shoo shoo get back)

I used to work with someone who had a message telling people she only checked her email twice a day. You pretty much needed to call her if you needed anything outside of those times. (She worked in a remote office.) I think she had read one of those books on efficiency that recommended scheduled email time. But there were problems with this: 4. My department often had to email attachments or text to illustrate our questions/concerns. And we were on deadlines. Reading a page of text over the phone was not an efficient use of anyone’s time 5. She did outreach & was often out of the office on site visits, trainings, or travel to these places, but never ever set her OOO for these, because she was “working.” However, she was effectively not available to read emails from other staff until after hours on those days.
The big issue I have with the example in the post is that not only is it unnecessarily long-winded, but you have to listen through all the chattiness to get to the “here’s who to contact in a real emergency” part. The tone does rub me wrong, but I’m willing to roll with that as a personality/company culture thing.