-If you are unsure, then you probably want to use MSG. Otherwise, you
-may want to use one of the following:
-
- - MSG in Java instead of C: @ref MSG_Java.
- - If you want to use DAGs: @ref SD_API.
- - If you want to study a MPI application: @ref SMPI_API.
+\warning MSG used to be the main API of SimGrid 3, but we are
+ currently in the process of releasing SimGrid 4. The
+ tentative release date is Summer 2018. So MSG is frozen and
+ will probably never evolve. If you are starting a new
+ project, you should consider S4U instead. Note that the
+ support for MSG will not be removed from SimGrid before 2020
+ at least.