Philosophy of mind I think is only a good example of all the things we still do not understand about neurology and cognitive science. I am not personally disheartened by it, as I typically get excited about unanswered questions. But I would agree modern day philosophers would be well advised to read more interdisciplinary science journals if they want to remain relevant. A good example of this is the Bereitschaftspotential from Libet's famous experiments.The experiment was sound the results were sound, the interpretations however may not have been. Diligent philosophers could have pointed this out, but it was the work of a medical researcher who did disprove it's underlying assumptions.[1][2]
[1]https://www.theatlantic.com/health/archive/2019/09/free-will... [2]https://www.researchgate.net/publication/230624040_An_Accumu...