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Qualcomm and Google team up to offer 8 years of Android updates
(arstechnica.com)
This is a most excellent place for technology news and articles.
That may be the best option right now, but it's still a far cry from an upstreamed device
They aren't able to support devices longer than Qualcomm and Google maintain the random out-of-tree drivers for a chipset, and even state such in their "legacy support" for harm reduction