Continuous pressure of electronics for miniaturization resulted in development of very high CV class II MLCC capacitors that are offering high capacitance in smaller dimensions. Nevertheless such capacitors are working under very high electrical field that worsen its electrical parameters namely capacitance dependency to applied DC voltage and its ageing with time. This highlights importance of a suitable applications for these parts as what is suitable and enabling technology for smartphone designs may become a risk factor for automotive or higher reliability industry.
Industry discussed these issues during the PCNS passive symposium in Bucharest 2019, you can review tutorial, panel discussion and outcome here:
tutorial paper 25min read
Another article with technical explanation of DC BIAS impact and measurement to class II MLCC capacitors was released by SEMCO Samsung Electro-Mechanics in July 2020: