Glad to hear they are open sourcing, and I hope it works well for them.<p>I think being open source is going to be required to get pyston supported by the rest of the python community. As i know for many organisations I have worked for python kind of sneaked in the back door, and without being open source, would have limited the viability. Once in it becomes easier to add support.<p>I think there is a good opportunity to sell support / consultancy services around performance for python, and having the engineers optimising the runtime able to be leveraged adds a lot of value. Essentially becoming for python what azul is for the jvm.