Depending on open source software is a sounder choice than depending on proprietary one because you have the source and can do with it as you please.
In the ecology of the open source world, no node is indispensable. Developers can drop out, and distributors can fail, without it having a global effect on the ecology as a whole.
We can observe that some firms employ open-source developers (open R&D) for the sake of increasing the total number of units shipped, and by proportion their share of it.