But when a mid-tier or entry level dev can do 60% of what a senior can do, it’ll be a great way to cut costs.

Same as how an entry level architect can build a building 60% as tall, and that'll last 60% as long, right?

Edit: And an entry level aerospace engineer with AI assistance will build a plane that's 60% as good at not crashing.

I'm not looking forward to the world I believe is coming...