Good:

-regenerative braking conserves some energy

-electric motors kick in at low, most inefficient ICE speeds, improves mileage

-there is redundancy in two drive trains

Bad:

-added complexity - must maintain extra electric drivetrain

-added weight, car becomes heavier

-more expensive capital cost

Ugly:

-there are no hybrids without gulag tech surveillance

-unclear without climate scam subsidies if this is the market approach