I wonder if some people think that you need a fine fretsaw blade, so it will go down the fine kerf made by a specialised dovetail saw?
You don't and there's an easy way round that apparent problem - stay away from the angled cuts and saw down the middle of the waste, using a coarse, quick coping saw, then steer off in a J shape into one corner. Back up to the bottom of the vertical cut and steer off into the opposite corner.
I think Jacob has posted on this in the past.
Incidentally, last time I did a batch of dovetails in softwood, I found it took about the same time using my treadle powered fretsaw, an ordinary Bahco coping saw, a stick and string framed fretsaw, or chopping all the way with a chisel. So I suggest using whichever way works for you and you enjoy doing.
