Depends how many hours per week you spend and how deep you want to go in it. I spent around 3 hours per week , thats 150 hours per year , 750 in 5 years. For someone working 40 hours a week on pharo it would have taken him only 5 months to reach my level. ��
Also in my case there were not that many libraries to help me out for the things I like to do , 3d graphics, custom GUIs and sound music. It was basically Morphic, Athens and Pharo Sound. Hence why I need to rely on external libraries. Web developing on the other hand would have required to learn Seaside and many other libraries that would have risen the learning curve quite substantially.��