Keep it if you like it. ChatGPT gives every person the same brilliant, context-free model in a private tab. Heidi adds what it is missing: your company's memory, answers in the open, agents that act, and one price instead of seats.
The failure of per-seat chat licenses is structural, not a quality problem: every conversation is private, so nothing compounds, and every answer is generic, so the hard questions still route to the people who know.
Heidi is not a replacement for the model, she is the context on top of models. She works where the team sees it, remembers what was learned, and serves that memory to any tool, including, over MCP, the assistants you already pay for.