I was just looking at
this thread, about tying flies on size 24 hooks, and it occurred to me that in other forms of fishing I would very seldom use an eyed hook larger than a size 12 or 14, because in smaller sizes spade ends are more compact. Obviously, to tie a fly on a spade end you would first have to tie on a length of tippet, and to change a fly you would change both fly and tippet, but for flies tied on hooks smaller than a #20, it seems to me that this would make life easier on the bank, not harder. For delicate presentation of tiny flies, I'm sure you could do a better job on a spade end hook.
Is it done, if not, is there a reason not, or is it simply force of habit to use only eyed hooks?