Ok thanks for those comments.
I didn't know where the Wed Dock line was until this post and did some googling and then Street View. I remember a few times in early to late 90's driving over the Gatetway looking at the line and it was unused if I recall or looked similar.
Now today if you look at the former corridor through the city and Docklands, you sort of open your eyes a bit and think they built a freight railway here, in the mid 1980's, basically prime river front land when similar lines elsewhere were being removed, Seriously!!!! The fact it had very tight curves again built in the 80's is another eye opener.
I suppose back then where was Webdock's customer base? was it all Melbourne Surburban?
i suppose my point is I can sort of see why the unloved line was closed and removed on the sections it was and I think it would have been messy to keep it, but yes it could have been done. But obviously today times have changed and it needs to be returned but obviously this is more complex than probably the original line.