I don't think they're planning on forcing you to buy their products :) As far as I can tell, there exists no "open source stuff developed by a large community

I don't think they're planning on forcing you to buy their products :) As far as I can tell, there exists no "open source stuff developed by a large community of people" to run integrated server rack hardware. But if you're using such a thing, then I'd like to know what it is!