It does, until you cook a laptop beyond its operational thermal tolerances because you shut the lid, threw it in a bag, and it never suspended.

If that's a problem you don't have though, it's not something you need to worry about.

    sudo pm-suspend

Having to type that before I put my laptop in a bag is worth not having to worry that the laptop will spin up in the bag and cook itself trying to update the OS.

aliased to "zzz", and a sudoers entry to not require password - been perfect for years :)

Why do we need to type anything though? That's terrible UX.

Coming out of suspension with the lid closed is even worse UX.

Yes. It's frustrating how far backwards we must bend to make that impossible.

Which is a problem, but my 2015 Macbook did that way more often (which is to say, a handful of times) than my Thinkpad which did that exactly once, while I was setting it up.