I use the bigme hibreak pro as my primary device. Its an eink device but also just a full phone. Almost bought the boox palma, but held back because I only really want to carry a single device.
Also it uses a color e-ink Kaleido which I personally find useless : the colors are still too washed out to be useful and the contrast is horrible with no backlight compared to B&W e-ink.
But it's still an interesting device.