The Pixel phones have staked out the expensive-but-good market for "pure" Android snobs.
Samsung has staked out the best-hardware-early market with deep ties to cell providers.
OnePlus has staked out the cheaper-but-surprisingly-good market previously held by the Nexus line.
Where does Essential fit? Rubin never answered this question. Outside of a few tech people, no one knows Essential exists...even OnePlus runs ads.
I suspect Rubin thought he could just build some brand buzz and flip the whole company?