There are already builds of Ubuntu 64bit that are very solid... https://jamesachambers.com/raspberry-pi-4-ubuntu-server-desktop-18-04-3-image-unofficial/ https:

There are already builds of Ubuntu 64bit that are very solid... https://jamesachambers.com/raspberry-pi-4-ubuntu-server-desktop-18-04-3-image-unofficial/ https://jamesachambers.com/raspberry-pi-4-ubuntu-server-desk...