Gary Marcus is not the man to be looking to on this topic

Gary Marcus successfully predicted all ten of the one AI Winters.

He also claimed that LLMs were a failure because of prompts that GPT 3.5 couldn't parse, after the launch of GPT-4,which handled them with aplomb.

Gary Marcus successfully wrote an article about getting image generation models to show a horse riding an astronaut, which is all I needed him to do. (Actually he wrote two, but this one felt more concise.) Take it as an existence proof, not an endorsement.