There have been clinical decision support systems that were pretty decent at doing DDX for decades, well before the current crop of AI LLMs. The issue is gettin

There have been clinical decision support systems that were pretty decent at doing DDX for decades, well before the current crop of AI LLMs. The issue is getting relevant data about patient history, symptoms, signs, etc into the system and then convincing doctors to actually use it. For most simple cases, using any form of clinical decision support (whether it's based on AI or simpler deterministic algorithms) just slows them down and they don't have time to waste.