UPDATED (June 2021): 17-distro multi-boot image for Pinephone (incl. 3GiB variant)

[megous]

I was able to get all OSs running on my Braveheart without any issues. Why was it that this wasn't recommended for the Braveheart?

I haven't tried expanding the partition yet; something I'll try later.

Thanks for the image - it was fantastic being able to try all OSs on one SD card without having to go through the hassle of flashing them all individually.
p-boot really works a treat!

This uses only 1.2 DTB, so the kernel will drive some HW incorrectly, notably type-c stuff, and modem powerup/powerdown will be probably broken.

I have to add support to p-boot to automatically load the correct DTB based on auto-detection of Pinephone variant, before this will properly support Braveheart.