I was faced with a need to load some extensions to tce/optional before beeing able to install them.
The 'download only' using the 'w' option can do it when the extension is on the web, but if it's on any other personal storage, it was not that easy to just copy the same extension and all that depends on to another location, (and specifically to tce/optional), to install it from there.
I feel that it can be very helpful if a similar option existed.
thnx