Nowadays, owners’ manuals are usually online, and you just get a quick-start guide to get you up and running.
I’ll order (and pay extra for a printed owner’s manual if that’s available, or download and print the online one. I have them all in binders.
I even save the little cardboard card that comes with, say, a baking dish, because it’ll have the max oven temp on it, or whether it’s broiler-safe, and I always forget that.
Funny story - you know I love my America’s Test Kitchen/Chris Kimball stuff - well, he went out of his way on one episode years ago to warn people that Pyrex glass baking dishes aren’t broiler-safe, and he detailed how they cracked one in the test kitchen, thought it was a manufacturer’s flaw, until someone was smart enough to read the owner’s guide, where it plainly said it wasn’t broiler-safe.
He tried to play it off like, “Well, that’s not our mistake, because everyone just assumes they are,” and I was yelling at the TV, “Speak for yourself, Kimball, I read that when I bought my first one 25 years ago, numb
! RTFM!*”
*Read The Fu…er
Fine Manual