I'll ignore the part where you're wrong about the lock-in, but to the rest of what you said... Yes? I guess I didn't think it needed to be said so explicitly

I'll ignore the part where you're wrong about the lock-in, but to the rest of what you said... Yes? I guess I didn't think it needed to be said so explicitly, but if you are opting into Plot and Framework, you are accepting convention over configuration as they say. And for some situations, that is what you want. If you value flexibility and control above all else, then I agree they may not be for you. But if you value other things, like speed of iteration, or just getting some good data visualizations built without a deep investment in learning underlying concepts, then Plot and/or Framework have definite advantages over doing it all with D3.