Micro 4/3 and te two kit lenses for long term use.

Anyone have any thoughts on just using an Olympus pen with the two kit lenses for long term use. The kit lenses are 14-42mm and 40-150mm or there about. What do you all think about using this combo for a year or more? Do these lenses give enough range and flexibility for long term use? Any thoughts and opinions are welcome.

I have seen videos were photographers say a prime 35mm and 50mm lenses are great to have. But the two kit lenses cover that range. Anyone own a camera (DSLR, u4/3, whatever type) and only have two lenses, are you happy with your kit?