The key is to understand what someone is actually good at, rather than lump them into some amorphous "generalist" category. Along with (presumptively) broad experience, a generalist is just a specialist at various things which often feel obtuse or reductive to delineate — e.g. "I'm a specialist at rapidly narrowing vague failures into specific causes, assessing scalability trade-offs, understanding edge-cases at the intersection of two programming languages, and optimising cache invalidation."

Perhaps the best generalist skill when working in teams of specilists is "a reasonably accurate bullshit detector."