I have the BPI-F3 and it comes with Bianbu distribution by default. It is based on old LTS versions of Ubuntu with some updated packages (like Mesa) and some packages optimized for the X60/K1 CPU. The problem with this CPU/SBC is that SpacemiT is bad at upstreaming the support, they do support only in their own forks of Linux kernel and other software. So upstreaming is done by volunteers and is progressing very slowly (example only for the Linux kernel), so usual distros like Debian do not have support out of the box. Also it is a problem that the K1/X60 has some Imagination PowerVR BXE-2-32 integrated graphics and this one is not supported by Mesa and only has closed binary drivers which Imagination provides to SpacemiT and they then add it into Bianbu. Also keep in mind that even this driver does not support OpenGL (the normal desktop one). Only OpenGL ES and Vulkan. So in essence this means that the compositor/windowmanager and the toolkits like Qt need to be compiled with this support which is generaly not the case in more normal distros. Sometimes they provide two sets of compiled packags, one with normal desktop OpenGL which you then have to replace with the openGL ES variants. And these are usually not so well tested in the normal daily desktop use case.

So for daily use you more or less have to stick with Bianbu Linux on it. If you do that, I would it is quite usable, if you do not find GNOME-based desktop it has limiting as I do, since I am used to the power and plethora of features in KDE Plasma :) It is a bit slow for some more demanding tasks like video, graphics, games and stuff like that, but yeah, for simple office usecases, it is fine. So depends on what you would use it to do.

I remember seeing this video a bit over a year ago: RISC-V Week: 7 days only using RISC-V computers. I’m not sure how far along these SoCs have come, but I imagine the current state of the art is somewhat improved from 18 months ago.