That said, as someone who travels a lot, when I look at travelers' catalogs like Magellan at a lot of the safety, germ protection, etc. items, part of me thinks that people who buy all that stuff are probably better off just not traveling.
They're definitely abusing the word 'most' there. I've stayed in easily 20 hostels at this point, and not once has a 'sleep sack' been required. And in all my hostel research, I have never stumbled across someone mentioning they needed one.
I don't think I have on the relatively limited occasions I've stayed in a hostel (or a mountain hut). That said, I'd certainly heard of sleep sacks sometimes being used/required in hostels. So it can't be all that rare--or maybe it used to be more common.
Makes sense I guess although I've never run into that requirement.
By description the thing she had was much smaller & more form fitting than above link. One of the "selling points" was how small it packed into carry-on, for example.
That said, as someone who travels a lot, when I look at travelers' catalogs like Magellan at a lot of the safety, germ protection, etc. items, part of me thinks that people who buy all that stuff are probably better off just not traveling.