Hi there!
Thank you for the kind feedback. It is a very interesting project.
I really think Haiku would be awesome on RPI. Unfortunately it seems that the Arm world is a little bit messy. Only for RPI there is big difference between RPi2, 3, 4 and 5.
It seems very hard to support all the Arm boards, especially for a small community as Haiku.
I will try my best shoot on RPI500+
It seems to be a very capable board. 8 or 16 GB ram …. 250GB SSD and a mechanical keyboard with RGB, the kids love RGB nowadays 
.
Wifi support seems to be a real challenge, also the GPU as well.
My approach will be to re-use X512 awesome work on Nvidia driver but for
VideoCore VII. That approach will save us months, maybe years I hope.
and finally. GPIO is a must on RPI 