The BQ41Z90 battery management chip is *still* in "preview". It's been in "preview" for a full 15 months. Even though it's specs fit my needs perfectly I'm forced to assume that it has some deep unfixable eldrich-horror flaw.
https://www.ti.com/product/BQ41Z90
BQ41Z90 data sheet, product information and support | TI.com

TI’s BQ41Z90 is a 3 to 16 series Li-ion highly integrated battery fuel gauge, monitor and protector. Find parameters, ordering and quality information