Is internal combustion an "incremental" change from steam engines? That's the kinds of lines we're talking about. In a way, lithium ion batteries are increment

Is internal combustion an "incremental" change from steam engines? That's the kinds of lines we're talking about. In a way, lithium ion batteries are incremental - they're just batteries. But they've enabled modern phones and modern electric cars, so they're kind of radical tech in their own way.