LPE is a very well-known acronym within the security community, it's not purely academic or obscure or anything.
I agree that it would be a good idea to define it explicitly when writing for a broader audience, but I don't think it's particularly egregious that they didn't. It's certainly something I could see myself forgetting.
Then again, the whole writeup appears to be AI-generated, so...
It is nowhere near this. There are very few acronyms in the IT world that are actually well-known outside of it. LPE is less well-known than LVAD or MCU.
https://www.acronymfinder.com/Information-Technology/MCU.htm...
https://www.acronymfinder.com/LVAD.html
https://www.acronymfinder.com/Information-Technology/LPE.htm...
Sure, but the target audience of copy.fail is surely not the security community but regular sysadmins who probably don't otherwise follow as closely.
I would absolutely expect a sysadmin in particular to know and understand the term and acronym.