README.md: Motivation

README.md

@@ -4,6 +4,15 @@
 
 Make it easier to write, re-use and template CloudFormation templates
 
+## Why did you do this?
+
+Writing and maintaining CloudFormation templates is tedious, but using tools that
+take you _too_ far away from the CloudFormation templates gives more opportunity
+for bugs to creep in and leaves you operating several months behind updates to
+AWS services and CloudFormation.
+
+But mainly I needed something to fill up some free time.
+
 ## What it does
 
 * Works with existing CloudFormation templates. (Some possible issues with the Symfony YAML parser notwithstanding.)