- - Simulating algorithms with one of the legacy interfaces: :ref:`MSG
- for distributed algorithms <MSG_doc>` (in :ref:`C <MSG_doc>` or
- :ref:`Java <Java_doc>`) and SimDAG for
- centralized algorithms (in C). SimGrid was founded in 1998, and
- many interfaces were proposed along the way. MSG (introduced
- around 2002) and SimDag (introduced before 2000), are still present
- in SimGrid. They do not evolve anymore, but given their popularity,
- they will not be removed until at least 2020. That being said, our
- goal is to make S4U so useful that these legacy APIs become useless
- and obsolete.
- - We are currently working on the ability to modify any existing