"Informed decisions" mean you need to have the information.

Like with software development, we often lack the information on which we have to decide architectural, technical or business decisions.

The common solution for that is to embrace this. Defer decisions. Make changing easy once you do receive the information. And build "getting information" into the fabric. We call this "Agile", "Lean", "data driven" and so on.

I think this applies here too.

Very big chance that MinIO team honestly thought that they'd keep it open source but only now gathered enough "information" to make this "informed decision".