Hi I would like to have Nile in the image because I want to get rid of the old stream implementations slowly migrating the missing parts slowly to nile and I'm afraid that we lose the great work on damienC. I tried to harvest yesterday the item related to the back broken behavior in stream hierarchy but too much changes already happened. I could not find my way and lost time. I asked damien to help me but this is a sign. The plan could be to have Nile in Pharo-Dev for a couple of milestone and at a point switch (remove the old stream hierarchy and replace it by Nile). Also with DamienP we wrote more tests on collections and traits are really working great for that. Really! I imagine that we will have a really good test basis for the collections soon and that with Nile in the image I can improve the test coverage of Streams. I should say that I really fed up with some of the code aspects of Squeak (fileout of classes for example is a huge mess, file/directory....). Stef