-@warning <b>S4U is not ready for public use yet</b>. You should not go
- that path unless you know what you are doing. If unsure,
- proceed to @ref MSG_API instead.
+@warning <b>S4U is not as rock stable as the rest of SimGrid yet</b>.
+ You are really welcome to test it, but be warned that the API
+ may change without notice between releases. This is however
+ the way to go if you want to create a new long-term project.
+ If you want to play safe, proceed to @ref MSG_API instead.