Applicability of layer styles selectively on selected portion of whole text paragraph on a layer

Layer styles such as bevel, stroke, outer glow, and drop shadow can currently be applied only to an entire layer. I believe some styles — particularly stroke and glow — should also be applicable selectively to specific portions of text within the same layer. This would allow users to highlight selected text more effectively and make the overall design more attractive by applying strokes, glow, and similar effects only where needed.