As I remember, there been an effort in github to give CLI command lxc list the feature of listing all containers through all projects, which will be handy and user friendly, rather always adding --project xyz
Something like: lxc list --project * or --all-projects perhaps.
BTW, I am using self defined lxcls in .bash_aliases:
alias lxcls=‘for i in $(lxc project ls | grep -v NAME | grep -v + | cut -d " " -f 2); do echo — $i —; lxc ls --project $i;done’
should someone need it.