Comment by TuringTest

Open-source has many technical advantages over closed-source, in addition to the moral ones (which are quite powerful themselves).

Being able to inspect the software you use makes you able to trust house it works, and fix it at points where it's not working; those were the first motivators for creating the FLOSS movement.

There's also the advantage that in the long term you don't depend on the company developing the software; if the company goes under, or simply stops supporting the software, you can hire a different batch of developers to carry on maintaining it. That's the reason why many big contracts require that the software vendor puts the source code under escrow.

In reality, closing the source of software only benefits the seller; everybody else benefits from having it available. With FLOSS, you get that for free.