iOS and Mac OS X were built and scaled on Objective C, which is highly niche in that it has almost never been used for anything else besides these projects, and

iOS and Mac OS X were built and scaled on Objective C, which is highly niche in that it has almost never been used for anything else besides these projects, and it was even less popular before those projects existed. Objective C would never have been chosen with risk-based technology decisionmaking. They would've chosen C++ or Java. Apple was weeks away from bankruptcy when it adopted OS X, and is now one of the most successful companies in the world, having rescaled from the ground up on OS X. The iPhone's iOS is perhaps the most financially successful bit of consumer software in history.