yup, lots of differing opinions.
I discovered after nearly my whole life, that my dgd "baby" pillow I helped her big sister make, that
as a mostly stomach sleeper, I had been sleeping on pillows that were too big!
My dh gave up one that his chiropracter designed that has a rectangular hollow in the middle and
I confiscated that one too.
It's mostly our necks that need the support and proper alignment anyway.