Is right brain/ left brain distinction still useful?

Answer 1

If by “useful”, you mean widely accepted as a way to differentiate how people learn or what they may be good at, then no. For further explanation and a more in-depth discussion of what right/left brain distinctions may be useful for, see this article from Harvard’s Health Blog:

https://www.health.harvard.edu/blog/right-brainleft-brain-right-2017082512222