I've known quite a few friends and some family with speech impediments (maybe there's something in the water), but they all seem to do much better when they are in their wheel-house. I guess that public speaking on topics you are comfortable with could be quite positive. One of my family members was able to remove it entirely, he became a chef and was required to shout orders a lot.
Making my predictions for 2020, I thought that co-operation with fungal systems would slowly ramp up this year. Probably just that I'm looking for evidence I was right, but it's a fun connection to draw about someone who seems in some way at least adjacent to that scene.
