I wonder what the process of choosing a new platform looked like and how they landed on Microsoft To Do. Hopefully they do a followup post.
So much good opensource software has come from university funding and university-originated projects and you'd kinda hope that that culture pervades. I guess Duke isn't quite Stanford or Berkeley, though.
I neither know Basecamp nor To Do that well, so I might be completely wrong. But I think Basecamp plays in a different league than To Do, doesn't it?
This is just one department within the university. It's not uncommon to see small groups paying for some software only to eventually replace it with a site licensed enterprise alternative.
See also: MS Teams replacing Slack at big organizations