Earlier quoted context omitted.
I don't think there's anything Notion has that Microsoft wants.
They would want the user base, i.e. those who has gone out of their way to pick something different, than Microsoft/Atlassian, like Notion
Despite Slack's presence in the startup space, Teams dominates the market (fair play or not different story).
I'm not sure I buy Microsoft being that interested in Notion's customer base.