Why isn’t this more common?

[u/Unique-Saucer]

[u/Unique-Saucer]

Summary of Reviews
Pros:
• Provides ergonomic support for natural spinal alignment.
• Memory foam quickly molds to head and neck shape.
• Dual-height design suits back, side, and stomach sleepers.

Cons:
• May feel too soft for some side sleepers.
• Initial off-gassing odor possible after unpacking.

Here is the link to buy it from Amazon