I would like to say that its best feature is its different kinds of connectors. We have lots of in-built connectors. If they do not have any real connectors, then they have an HTTP module and SMTP module, with which we can connect to any web application.

ColdFusion is a genuine rapid application development (RAD) product. Moreover, it’s well maintained and very, very stable. The language is also very easy to learn and it is easily scalable in a clustered environment.

The ability to write SQL queries was very helpful as we did not need to bother our DBAs in writing stored procedures for simple tasks.  

When I started using ColdFusion, I only had experience with PHP, and compared to that language, I was amazed by the simplicity and the structure. From that moment forward, I got experience with Java, JavaScript, Mendix, and more. And compared to other server-side languages, it has a way more developer friendly approach and a less steep learning curve.

No need to import libraries from outside the environment.

ColdFusion and CFML (ColdFusion Markup Language) provide almost everything that a web developer needs, which is  probably a lot of things that they do not even know that they need, such as integrated Solr, ORM, the capacity for creating APIs, the frictionless integration with SMS by the ColdFusion SMS event gateway, and so many more: cfmail, cfftp, cffile, cfhttp, etc.