Going back to April 2024, SiFive announced the HiFive Premier P550 as an interesting RISC-V developer board to succeed their HiFive Unleashed that was a nice little RISC-V board. There were delays in shipping the HiFive Premier P550 but they have been making progress and are now ready to ship Ubuntu 24.04 LTS pre-installed on this RISC-V board. They have also lowered the pricing on these RISC-V boards.
The two news items from SiFive today are that Ubuntu Linux is now able to ship pre-installed on the HiFive Premier P550 following their engagement with Canonical. Ubuntu 24.04 LTS with the RISC-V build should now be in good shape on this board, similar to Ubuntu on the earlier HiFive Unleashed board.