AI has been drastically improving for the past couple decades, and if that continues then AI is obviously going to kill the software industry and many other industries.

Sure, maybe apparent exponential growth tails off into an S curve at some point, as often happens. But this blog post seems to assume that is guaranteed to happen, which is a big leap of faith, and also makes this not a very interesting blog post. Because it's basically just, "Well if I assume the best arguments against my position are wrong, then I don't even need to address them, and I can instead focus on lesser arguments that are easier for me to discuss".