alt Hacker Newsi had that experience with them a few years ago but not these days. The models are being improved constantly, so here my "non expert hunch" is that...well, two things. either the models are getting better at sycophancy, OR, I myself am getting better at prompting - because I don't "argue" with a model.
I'd still love to chew on some specific examples though.
A typical example is when discussing some issue where there is no clear right or wrong. Architectural decisions for example. Then it is easy to use an LLM to produce arguments for your opinion. It is also easy to do this without realizing it because you do not understand the issue enough yourself so you do not know what questions to ask or how the actual circumstances affect the choices.