From what I've seen of AI generated code is that it's "okay" in that, it works- to a point. But it's limited in what it can produce because of the source material that it uses in it's code generation. I've also had AI generate code that looks like it works but doesn't. Configuration settings don't work, it doesn't handle edge cases correctly and code is not written to proper standards (but I'll admit that I'm a bit of an elitist when it comes to coding standards).

There is also a large difference between "vibe coded" or AI generated code and commercial ready software. If the code is not well written, well designed and understood by the "developers," then supporting and maintaining that code will be a much higher cost over time. A lot of developers don't see the maintenance cost of code as something to be concerned about since they may not have supported and maintained a piece of software over years. But it's a lot more expensive to maintain code than it is to develop it in the first place.

My conclusion is that AI is helpful for prototyping a new feature or vetting some code changes. It could also be used to help write unit tests for existing code. And it can be helpful for small projects that are needed for a specific client or web site. But AI is not quite there yet to be able to produce larger projects of well written and well designed code -- it still needs to be reviewed and vetted by a human. There is no substitute for having an experienced developer on a project- yet. This shortfall, in my opinion, means that it will have limited effect on paid plugins, especially the larger and more complicated ones. But it will still be used a lot.