It is a relatively old chip and didn't pack enough punch to be considered anywhere near as powerful as current - gen machines. (segmentnext.com)
One partially valid explanation may be that the actual processing of facial expressions in real time might be a task too complex for older chips. (bgr.com)
Intel has halted patches for an array of older chips that would protect them againstthe Spectre vulnerability, according to a recent microcode update. (hackbusters.com)