I switched to buckwheat pillows a few years ago and I’ve been a fan. It’s a really interesting texture that you can move and shape really easily, but then when you apply pressure to it, it firms up and holds its shape. So, you get a really supportive pillow that’s molded to your head and neck (For reference, I’m a side sleeper). The only downside I’ve noticed is the filling degrades relatively quickly, and after about a year it loses a lot of its volume and doesn’t hold its shape as well, so you’ll need to replace it. The bright side is that it’s fairly cheap, and entirely biodegradable.
As soon as FUTO gets a split layout, I’m definitely switching over, if for no other reason than the slider for how aggressive auto correct is. I’m so sick of Gboard constantly correcting the word I meant with one that doesn’t make any sense.