I'll believe that from German researchers when LLMs start shoehorning four nouns together instead of just delving.

A team from the Max Planck Institute for Human Development in Germany published a non-peer-reviewed preprint copy of research they say detects that words that ChatGPT uses preferentially have started to appear more frequently in human speech since the bot was unleashed on the world in 2022.

So-called "GPT words" include comprehend, boast, swift, meticulous, and the most popular, delve. After analyzing 360,445 YouTube academic talks and 771,591 podcast episodes, the team concluded words like delve, swift, meticulous, and inquiry were just a few examples of terms that began appearing in more podcasts and videos across various topics.

I'd like to nominate "authenticity" as the vapid word of the year.