The problem with the erasure coding implementations: patents. An example:
https://www.techdirt.com/articles/20141115/07113529155/paten...
https://www.techdirt.com/articles/20141115/07113529155/paten...
http://ceph.com/docs/master/rados/operations/erasure-code-pr...
edit: Indeed, checked jerasure site and that's gone.