We're doing an IT refresh at work and have some old mid-2011 iMacs in a classroom. I thought I'd just try wiping one using internet recovery to see what happened (it failed), but thought the estimated download time was pretty hilarious. It did jump down from 53 minutes to 31 before it decided to give up 🤣
I'm so glad you commented that, because after I posted I realised I'd forgotten to ask if anyone knew why that particular number of hours was displayed because I thought it mustn't just be random. Every day's a school day 😁