The short answer:
This is a flagship feature. A mod menu can add every car—including pre-order bonuses, Forzathon Shop exclusives, and even the elusive Owen’s P1 McLaren—directly to your garage. forza horizon 4 pc mod menu
Create or download custom blueprints with long straights and many checkpoints. A well-designed 30-second race can be repeated for quick credits and XP. The short answer: This is a flagship feature