I mean. This whole "article" is an opinion piece. Some of the opinions I even agreed with but there's a lot of "I think" involved in a lot of the paragraphs written here.
That's the case for all predictions on the future of AI. They are all just opinions, some more informed than others. The author does clearly cite some of the things that are informing their opinion in this case, so I'm not sure what your problem is there. I'm also not sure why you put article in quotation marks; this is clearly an article. Your comment seems like a lazy attempt to discredit the piece and shutdown discussion without bothering to respond to any of your real problems with it.
How is it delayed and slow? We recently got an update to Llama 3, a new Mistral model and Flux for generating images. All of them are a big step forward and I regularly see how big advancements are being made. I can see with my own eyes how they're getting more capable by the day...
So yeah, the bubble is probably going to burst. Because companies have pumped in lots of billions of dollars and inflated it to no end. That's not sustainable. And I can see how your experience might be different if you limit yourself to using ChatGPT. Because people want a big surprise with version 5 for some time now. But that's just hype. And has nothing to do with technology. Or competing products.
I think the main issue isn't directly that, but that they payed $600 billion for things like NVidia hardware, electricity, experts, ... And now they need to generate an absurd pile of money. That's why they might be doomed, because their product now has to fulfill ludicrous expectations.
The thing is that generative A.I is not really a new thing, secondly the question is not whether the technology will be transformative rather than if the investors can be patient enough to see that.
When it comes to AGI generative A.I is probably part of it but I would guess we need breakthrough or two from other areas as well which could happen in next 5 years or take a decade or two.