Yeah, you're saying that BSD code, which you can get for free and give nothing, is the most convenient thing for you in helping you create closed source commercial programs. Well sure.

I'd mention for a commercial library creator, say QT, the GPL can be quite convenient because the commercial clients they have can't just take their stuff for free and use it but instead can use the GPL to sample and then come for a commercial license when they're going to use it that way.

That is to say, just about every license that is used today serves a particular purpose for vendors and thus none of the licenses are likely to go away as long as we have different vendors with different aims.