The end of terminals has been forecast ever since mouse pointers showed up. If you build any nontrivial workflow across weird infra and hairy edge cases, GUIs locked to whatever version of "AI assistant" they're pushing will either make you faster or block you until you rage-reopen a shell.

I think there will always be a class of tool for users who want escape velocity from vendor UX conferences and forced upgrades. The moment sandboxes or walled gardens get in the way of the weird things that keep devs productive, someone will bolt a CLI to the latest AI.