由于EDGE目前只在预览版，必然有一定的缺陷和功能的限制。
Because Edge is currently only in preview-stage, it's bound to have some bugs and feature limitations.
这些内部的电信号包含一定的认知和行为状态的信息，但是，到目前为止，我们不知道它们是否真正的改变大脑自身的活动。
These internal electrical signals contain information about certain cognitive and behavioral states but, until now, it had not been shown whether they actually change the activity of the brain itself.
开发商的另一个障碍可能是目前的API有一定的服务的限制。
Another drawback for developers may be that currently the API has some service constraints.
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