Power Shift: 48V Takes Hold.

"The industry will sell an estimated 1.2 million 48V mild hybrids globally in 2019, the report reveals, and that volume will grow rapidly, reaching a forecast 9.3 million in 2024 and rising to 17.3 million in 2028. At that point, 48V mild hybrids will account for 17% of annual new-vehicle sales, says forecaster LMC Automotive."

"With Europe now leading the world in targeting vehicle carbon-dioxide-emissions reductions, the region’s automakers are at the forefront of the march to 48V. Of the 48V hybrid sales forecast globally for 2019, Europe accounts for 33%. That penetration will rise to 47% in 2024, according to the LMC forecast included in the report.

German OEMs have bold plans for 48V hybrids in their mixes. Leader Volkswagen Group is expected to have more than 40 48V mild hybrids on the market in Europe in 2028. BMW and Daimler are forecast to have 20 such models in each of their European showrooms.

By nature of its sheer size, China also will be a big player in 48V mild hybrids. The world’s single-biggest automotive market will have the highest volume of 48V hybrid sales, reaching more than 5 million units at the end of the forecast period in 2028."

"Suppliers are gearing up for the transition, with technology under development for more advanced stop/start systems and extending beyond mild hybrids to 48V full battery-electric city cars and plug-in hybrids. Other systems and components ripe for conversion to 48V include all-wheel drive, climate controls, superchargers, suspensions and oil and fuel pumps."

https://www.wardsauto.com/alternative-propulsion/german-automakers-leading-way-48v-electrification

You simply don't need large volume per unit when you have massive scale.