In a sense it's a question of vertical versus horizontal integration. (Figuratively and literally) Do you want to concentrate just on what you're good at, or

In a sense it's a question of vertical versus horizontal integration. (Figuratively and literally) Do you want to concentrate just on what you're good at, or the whole stack? There's not a right and wrong answer, but it's best not to have too much value tied up in something that you're not focusing on.