> But different tasks require cars, other tasks require trucks, vans, bicycles, motorcycles..
No, they don't. You may believe that some frameworks or programming language are ideally suited for some particular tasks, but that is mainly dictated by your prior experience (or lack thereof). The truth of the matter is that a van can very well do the tasks you conceive for a car, trucks, bicycles, motorcycles, etc. If you go with a van, you avoid the problems of having to maintain car, trucks, bicycles, motorcycles, etc. This is called software engineering.
No, they don't. You may believe that some frameworks or programming language are ideally suited for some particular tasks, but that is mainly dictated by your prior experience (or lack thereof). The truth of the matter is that a van can very well do the tasks you conceive for a car, trucks, bicycles, motorcycles, etc. If you go with a van, you avoid the problems of having to maintain car, trucks, bicycles, motorcycles, etc. This is called software engineering.