Now using this Ubuntu beta Hirsute Hippo 64 bits for some time. There are still daily updates to improve the software
But I have never seen a probleem.
Works great with OpenPlotter 5.2.4 Focal version. With SignalK server en MxTommy for the display of the instrument sets.
It has a nice graphic interface with easy to touch icons for touch screens.
All this is running on an RPI 4 with 2 GB.
It is a pity that it does not work with the OpenPlotter add-ons. The Groovy Gorilla does work with the OpenPlotter items.
And all this software is running from an usb3 SSD drive with the RPI without SD card.