I suspect part of what is so challenging for Tesla with the front of the vehicle, and so polarizing about what they've done, is that Tesla both,
1) (hurray!) "went cleaner, simpler" by getting rid of a relic of ICE vehicles in the grill, and so dropped a fake and fake looking vestige of an outdated technology (many of us, including its designer, were not satisfied with) and underlined that the vehicle is a step forward, and Tesla is confident about not being what people are used to,
and in doing so, also
2) (ugh!) presented an image that presents cognitive dissonance with our sense of what a human face looks like (which we clearly have a more than casual affinity to). at least one person here called the look of the white Model X "disturbing." my sense is that while not all cars have "eyes, nose and mouth", most cars, (and the ones most of us tend to like) have at least two of those three elements, and they are in proportion and in relation to each other in a similar way to a face. the X seems to have eyes and a nose centered at the "T", and a big space I think we all expect to see something roughly mouth sized and shaped centered in, NOT because of how ICE cars look, but because of how our faces look.
I think this is why many of us like the darker colored Xs best. I think the reflection of light on the lower overhanging section satisfies our expectation that there be a "mouth" where our mind imagines a mouth "should be."
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some people have said they loved the new look at first sight. others say it grew on them. maybe it's about the mind learning not to look to see a face.
whatever it is, I hope we all grow to love it. if consumers as a whole tend to have and stick with a displeasing take on this look, given the frequency other automakers change this area in mid-cycle refreshes, I don't see taking another crack at the front of the X as an onerous challenge for Tesla.