L3因为是人车共驾，责任划分、保险赔付等方方面面都需要考虑到。而L4不存在这个问题，出了事就是厂家负责。因为责任明晰，所以落地争议也较少，这就是现状。但是只要法律层面解决L3的责任划分问题，大规模普及也并不是遥遥无期。
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"There is something tactile about it when you hold it," said Dr Sara Machin, the finds lead for Access +, the consortium of archaeologists in charge of this project. "Even now it fits snugly in my hand."
This works, but it has a vulnerability: it hardcodes the native code string manually. If fermaw’s integrity check was especially paranoid and compared the spoofed string against the actual native code string retrieved from a trusted reference (say, by calling Function.prototype.toString.call(originalFunction) on a cached copy of the original), the manually crafted string might not match precisely, particularly across different browser versions or platforms where the exact whitespace or formatting of [native code] strings varies slightly.