That said, the best late 90s expression of the core advantage of the GUI over the TUI/CLI is that it demands less of the user:
"recognize and click" vs
"remember and type"
That seems very fundamental to me.
I have not seen as succinct expression of tradeoffs for V(oice)UI or L(LM)UIs
Want to know how to copy and paste quickly? It's Right There in the menu you found the action in. Don't know that yet? Alt + E (underlined in Edit) then some other key to jump to the action in the list, or you now see the list, abort the previous command sequence with Esc, and then start memorizing the new shortcut for Ctrl+c + Ctrl+v.
Maybe the chat interface does away with the first half of the GUI/CLI schemes, skipping over learning the affordance part of the interface.