Yeah, modern ICE is a massively complex control system problem, requiring so much more compute than EV, just to meet regulations.

Here's a funny example: the fuel vapor recovery system. It stores fuel vapors from the gas tank, that otherwise would have leaked into the air, in a canister of activated carbon. When under appropriate driving/environmental conditions, it opens valves and feeds the vapor into the intake stream, so it's burned.

[1] https://www.motor.com/wp-content/uploads/2024/07/Evap_0319-1...

Article: https://www.motor.com/magazine-summary/vapor-tales-understan...