These are just my thoughts about MY CLI experience with Juju.
CLI UX
I will take the opportunity to compare juju cli UX to kubernetes UX.
Btw. IMO k8 experience is definitely not the best.
1.) commands are using way too many hyphens
juju
juju add-model
juju add-unit
k8 (same for docker)
kc get pods
kc get namespaces
2.) inconsistent/confusing naming. I do understand that we do have a difference here and there. But this still makes the experience less than optimal
juju
juju kill-controller
juju destroy-model
juju remove-application
k8
kc delete <resource>
3.) formatting directives
juju
juju list-clouds --format=json
lists json stdout and stderr some information which breaks automation until you realize that
4.) Error handling
read more on here: https://discourse.jujucharms.com/t/juju-command-output/2417 (partly related to 3.))