You realize that have of the features you are counting are now in Go while missing in the beginning exactly because people were missing them and Go simply did not offer a sane way to work around the missing features?
I'm also quite sure that Go will provide a more sane way to handle errors in the not so far future, since it's continuously at the top of people's complaints
They simply can afford to pay more high performers. And since they have sustainable growth, there is no reason to switch course of action.
Compare this to consulting which is known for squeezing their employees to the max. They simply pay enough that there is a steady stream of new highly qualified and highly capable candidates.
Also I do not agree with the premise that we can only think about one thing at a time.
We routinely communicate with multiple people at once and also communicate with the same persons in multiple threads of conversations.
Of cause this means that we switch between those tasks and do not really do them in parallel. At most we listen to one person, answer a second via speech, a third via text while thinking about what to respond to a fourth
I think you are missing up concepts here