Update README.md

Author: fuzzykiller

README.md

@@ -4,6 +4,8 @@ Perform a cursory check of `node_modules` to verify everything specified in `pac
 
 Initial version is written in C# for .NET Framework/Core.
 
-## Motivation
+## :warning: Outdated
 
-Doing `npm install` or `npm ci` on every build is not feasible. First, we should check if it’s necessary.
+This project was built quite some time ago and not really updated since. In the meantime, the `package-lock.json` format has evolved. This means the program(s) may either crash or, worse, produce false positives/negatives. **The programs in this repository should no longer be used as-is.**
+
+Futhermore, changes to `npm` make `npm install` a sane command again. On the other hand, `npm ci` is not sane at all and should IMHO not be used at all.