Then you rent a brilliant generalist that forgets your company after every chat. Heidi keeps what your company learns, and every AI you use reads from her. Licenses make individuals faster; the brain makes the company smarter.
Private chats mean every insight dies in a tab, every person re-explains the same context daily, and nothing compounds. One shared brain inverts all three.
This is not either-or: keep whatever assistants people love. Connected over MCP, they all get smarter, because they all read from the same memory.