Apple sauce - yes Apple crumble/pie - depends Tuna and apple sandwich - no Swedish apple cake - no because the pattern looks pretty Spiced apple jelly - no as you chuck it all in - cores and all
My cooking is a bit International ! Once I try something and prefer it to my old recipe I'll adapt and adopt it .
It also depends on what I'm making :
If it's an apple pie I always use unpeeled dessert apples - frying them in butter with cinnamon and making a circular pattern in the pastry - either it will have a pastry cover or not ! I like the look and the taste of butter with cinnamon . I think that it's French style .
I grate unpeeled apples for mincemeat and add booze soaked bananas (!)
I peel cookers for crumbles and make it the traditional English way .
I peel dessert apples for an apple cake . My old recipe is an Italian one .
I've used both dessert and cooking apples for strudel and peeled them .
Yes, I peel them. They are not bought ones, they are from our Bramley apple tree, and sometimes they are a bit bruised or rough, so I peel them thinly.
I stopped peeling them for e.g. pies and crumbles a few years ago. The only exception is for the apple cake I make very occasionally.
IIRC Delia’s mincemeat recipe says not to bother peeling them.
I’ve never had any complaints about my pies, crumbles, Eve’s pudding, or a pud I make with stewed apple, split trifle sponges and homemade custard, baked in the oven. It was out of a very old Katie Stewart cookery book and works very well.