I just downloaded and tested the standalone desktop app. It has a very pretty and responsive interface compared to Kanboard.

I have been self hosting Kanboard on my rpi for my own work, and I think that Kanboard still has many 'poweruser' features that Focalboard is missing.

If there is an easy way for me to migrate my Kanboard data over to Focalboard, I would definitely give it a shot as a daily driver.