Time and priorities. They didn't have the time until now as their priorities were elsewhere (as they should have been, they were building tools for their own use cases).
You can argue until the heat death of the universe about wether those priorities were chosen wisely, but it's irrelevant now. They built the tools for themselves focusing on what they found to be most important at the time. It's clearly worked out well enough for them and many of us like how Go turned out despite its short comings.
You can argue until the heat death of the universe about wether those priorities were chosen wisely, but it's irrelevant now. They built the tools for themselves focusing on what they found to be most important at the time. It's clearly worked out well enough for them and many of us like how Go turned out despite its short comings.