I have a huge confesion to make. For the past several years, after being "turned on" to the practicality...I use an electric knife on the bird.
Sacriledge, I know. But I've found I have much better control over slices when I can just move the electric knife down, instead of cutting back & forth with a regular knife. Especially if the bird is still warm and the slices don't hold together that well.
The electric is without a doubt the best for taking off legs & wings, where you need to separate joints without losing meat or ripping the friggin' limbs apart with your hands. Just bend against the joint, put the knife there and let it do the work.
I always take off the legs & wings, and put one horizontal cut along the bottom of the breast as far as it will go, that way the slices just fall off when I bring the knife down into the lateral cut.
My philosophy is - have fun, enjoy your toys, enjoy your romantic attachment to the old ways,...but when there's work to be done - the best tool for the job. Just the same as I don't use up the edge on my good knives to cut carpets (I use a Stanley 99 instead), I use what works best for me when bird carving.
Sincerely, Your unrepentant power tool user,
RH