It doesn't look like ai will enhance existing tools. AI allows everyone to build their own. Or at all eliminate necessity of any apps

I think "any apps" and probably "most apps" is too strong. It wouldn't be very productive to hand-roll your own filesystem, browser, cryptographic library, etc. At some point you have to delegate to another party. No person or corporation has the time and expertise to own and maintain every layer of the stack.

This article is a direct rebuttal of that idea.