If software costs 80% as much to write, what's unreasonable about thinking that more businesses would integrate more of it, hiring more developers?
I think both will happen. I was merely demonstrating that just because an AI can't replace the entirety of your work, doesn't mean it won't make you redundant.
Bingo. This additional throughput could be used to create more polished software. What happens in a free market; would your competitor fall behind or will they try to match your polish?