How does adopting Modular Architecture and Domain-Driven Design (DDD) benefit large Laravel applications?

// Modular structure: app/Modules/Order/
Order/
├── Models/Order.php
├── Services/OrderService.php
├── Http/Controllers/OrderController.php
└── routes.php

// Domain Service example (DDD)
class OrderService {
    public function createOrder(OrderData $data): Order {
        $order = Order::create($data->toArray());
        $this->applyDiscount($order);
        $this->emitOrderCreated($order);
        return $order;
    }
}

// Module registration (composer.json autoload or service provider)
'psr-4': {
    'App\\Modules\\Order\\': 'app/Modules/Order/'
}


// Bounded Context example
class OrderRepository {
    public function findByTenant(int $tenantId): Collection {
        return Order::where('tenant_id', $tenantId)->get();
    }
}