I am also consider using it again, but as installer is so new, I am afraid to brick the device 
Or maybe it works so well that nobody needed to write on the forum in a month as I only find few topics about it.
I already tried installing once, experience is documented here:
Summary: it did not work.
But from another GrapheneOS’ forum I learned that one needs to use a Brave browser on Ubuntu (my OS) installed directly from Brave website, otherwise web installer won’t work.
Also I learned from their documentation Web installer | Install | GrapheneOS that ones needs to install additional packages on Ubuntu, disable a service which interferes and needs to have an original phone’s USB cable for things to work.
So knowing that maybe I will try installing with web installer again.