Keep in mind, a plate is not a shield. The foil on the back of a strat guard does not shield the switch, wire between pots, etc. Making a continuous shield around those innards makes a significant difference in a noisy environment. I don't bother shielding my pickups because I don't like the loss of highs. I do shield my control cavities because it makes things quieter with no loss of highs. I shield my Les Pauls for the same reason.