Email and productivity would still remain separate workflows, but Superhuman would become the center of gravity from which all other tools are being managed.
Having all notifications in one place sounds scary: People are already struggling to stay on top of their inbox today and risk missing important messages.
Productivity and collaboration shouldn’t be treated separately. Instead, they should go hand in hand and that’s exactly what a lot of the latest productivity tools do: Figma, Notion, Airtable, etc all have messaging natively built in to their apps.