If you only want to sell digital downloads, then Easy Digital Downloads can replace WooCommerce easily. It simplifies the process and allows you to manage licenses, accept payments, manage users, and manage file downloads.
You can sell digital products with WooCommerce as well. However, it includes many key features to sell physical goods, cluttering the interface.
You’ll also need to use several addons to manage licenses, file permissions, and other virtual product features.
On the other hand, there’s a free version of the Easy Digital Downloads plugin. However, you need to use their professional business plan to get access to several features like shipping digital products.