I always wonder why nobody have never released a framework mainboard with rockchip. There is even one with a - very - slow RISC-V for OS developer FFS.

It would have to be integrated with other components in the laptop. The RISC-V mainboard was not made by DeepComputing alone. For Framework it was intended as a pilot study in these kinds of partnerships.

Even a framework carrier board for pi-style compute modules. There's a few third parties that are close to drop-in replacements.

Someone could plan to make a RK3688 laptop board for when the chip is released.