I think your argument works when comparing to a simple list, but trello has card memberships, labels, due dates, checklists, and comments to help fill the gaps.

I think your argument works when comparing to a simple list, but trello has card memberships, labels, due dates, checklists, and comments to help fill the gaps. The fact that even my non-techie customers can use it is also a plus (this is why I use Trello). Good luck!