Take for example a song I'm working on at the moment. Tracked it. Selected all my comps, great. Flattened it (but not merged), so I can go through and do all my edits. So I'm going through and there's a few things I change, cut out some dead sound, move a few early transients. Then I go back to the start and go through the whole track (lets say bass for example), to perform and edit any crossfades. So I get to a part where I've cut out some dead noise, and there's a little 'blip' when it comes back in. Fade it, no problem. Come to another of the same situation, crossfade doesn't work. Just won't apply it. The only way to do it, is add a tiny bit of the original signal just before where I want it come in, back in again, cut it, apply a fade to the start of the new little section, and then crossfade that into the piece I just wanted to add a little fade too. Yes it takes a matter of seconds. But when it would usually take literally a second, I'm taking 10 times longer than I would do. And considering it happens multiple times in multiple tracks, it actually adds considerable time to my editing. I just don't get it!