BSP quality is famously variable by board vendor, https://www.youtube.com/watch?v=niH1-NB6W8w

  Two products.. leveraged a Yocto-based board support package (BSP); one being in AgTech, and the other being in the veterinary space. These products have followed disparate practices when leveraging the BSP for custom hardware and software.. this talk [described] the two products, how the BSP was customized and used, and the resulting consequences.*