Compared to other platforms like Magento and WooCommerce the service and maintenance cost is much lower.
Without any technical knowledge, one can set up a dropshipping business.
Shopify has a large number of dropshipping apps. These apps can enable automation of order fulfillment. Orders are automatically forwarded to suppliers.
Shopify is a subscription base as the whole e-commerce is set done by them. Server maintenance and upgrades are handled by Shopify.
There are lots of free and paid marketing tools available on the Shopify app store.
Shopify has lots of inbuilt payment getaways. Even if it's not there then you can get it from the Shopify app store.
Shopify has its own community where developers, Merchants and experts share knowledge, tips, and best practices.