Analog chips can be real cash cows. Unlike digital microprocessors, a successful design can last for decades without any change in process node. You still get s

Analog chips can be real cash cows. Unlike digital microprocessors, a successful design can last for decades without any change in process node. You still get some really old process nodes being used on the analog side because they're still functional today. Power applications in particular need larger transistors for sourcing and sinking large currents. Smaller process nodes don't help much for many of those applications.