Is it worth learning the FortiGate or Palo Alto cli?

Hi, So i come from a heavy Cisco ASA and SRX background and i know their cli's very well. With Fortigate i've only ever used their GUI and i've never used a PA before. I know they both have cli's though, i'm wondering if it is worth learning them or does everyone just use the GUI on these platforms for pretty much everything?

Thanks