The piece makes the point that the features presented have negligible to no downsides in the context of gamedev (and other contexts as well), and your argument

The piece makes the point that the features presented have negligible to no downsides in the context of gamedev (and other contexts as well), and your argument doesn't refute that other than by assertion. It instead tries to disqualify the relevant points based on the credentials of the author. While making big assumptions about the author's experience in the process. It's plausible he has experience in complex, performance-sensitive, highly collaborative C++ as well. The whole argument hinges on partial information and disbelief, really.