Classifiers to classify things, traditional neural nets to identify things. Typical run of the mill.

In OpenAI hype language, this is a problem for "Software 2.0", not "Software 3.0" in 99% of the cases.

The thing about matching an informal tone would be the hard part. I have to concede that LLMs are probably better at that. But I have the feeling that this is not exactly the feature most companies are looking for, and they would be willing to not have it for a cheaper alternative. Most of them just don't know that's possible.