Quick response from the servers , easy to config

Comprehensive device database: WURFL has a large and constantly-updated database of device specifications, which can be very useful for developers who need to create websites and applications that are optimized for a wide range of devices. Customization: Developers can use the information provided by WURFL to tailor the user experience to specific devices and ensure that web content is displayed correctly on those devices. Ease of use: WURFL is easy to use and integrates seamlessly with a variety of development frameworks and platforms, making it accessible to developers of all skill levels. Performance: WURFL can help improve the performance of a website or application by allowing developers to optimize the user experience for specific devices. Cost: While some advanced features and services are only available with a paid subscription, the basic WURFL file is available for free, which can be a cost-effective solution for developers who need device detection capabilities.

I think the most useful is that big tech companies like AWS and Google can benefit from WURFL APIs and integrations.