The assumed paradigm is that a mattress is essential to good sleep just like a chair is essential to sitting. But why did mattresses become mainstream? When did the buffalo robe and pile of leaves go out of fashion? Could a good night’s sleep be had if, for instance, we slept on a sandy beach or the equivalent? Why did ‘they’ start saying a firm bed is best, and still provide a two to three foot thick ‘system’ of mattresses just to get you to that ‘firm bed’ effect?~ Patrick Clark from, https://zafu.net/sleep-therapy/sleepergonomics
I wish I’d found this 12 years ago. It took me forever to figure out a lot about sleep. I’m still working on the shoulder range-of-motion required to side-sleep without a pillow. (I still wake up feeling like I’ve dislocated my sternoclavicular joint.)
…anyway, yes, harder and flatter is unquestionably, always better for me. If I’m having trouble sleeping, I sometime get up, and get out my favorite, 1-inch-thick, inflatable air-mattress on the floor—so so comfortable . . . with my fave silk-cotton-blend sleep sack . . . and my fave little pillow . . . zzzzzzzzzzzzzzzzzz every time.