"5:5" means loud and clear, that is well-known jargon alright, which we can all agree upon.

"0:55" is another matter entirely.

My point is it doesn't make any sense to arbitrarily drop a zero then push the : sign forward just because it fits nicely and conveniently with a timecode.
5:5 really is "loud and clear", whereas 0:55 really is just an arbitrary and random time mark.

"5:5" means loud and clear, that is well-known jargon alright, which we can all agree upon.

"0:55" is another matter entirely.

My point is it doesn't make any sense to arbitrarily drop a zero then push the : sign forward just because it fits nicely and conveniently with a timecode.
5:5 really is "loud and clear", whereas 0:55 really is just a random time mark.