I rarely come across people who flat out say "it's not useful". They exist, but IME they're the minority.

Rather, I hear a lot of nuanced opinions of how the tech is useful in some scenarios, but that the net benefit is not clear. I.e. the tech has many drawbacks that make it require a lot of effort to extract actual value from. This is an opinion I personally share.

In most cases, those "big productivity gains" are vastly blown out of proportion. In the context of software development specifically, sure, you can now generate thousands of lines of code in an instant, but writing code was never the bottleneck. It was always the effort to carefully design and implement correct solutions to real-world problems. These new tools can approximate this to an extent, when given relevant context and expert guidance, but the output is always unreliable, and very difficult to verify.

So anyone who claims "big productivity gains" is likely not bothering to verify the output, which in most cases will eventually come back to haunt them and/or anyone who depends on their work. And this should concern everyone.

"productivity" is a misnomer. Sort of. The things I'm building are all things I've had on the back burner for years. Most of which I never would have bothered to do. But AI lets me ignore that excuse and just do it.

That's only because we're trying to not be too condescending.