> For lacing that was cut in the middle fixing is a slightly more involved process.
Only if you are speed lacing and do not knot the intermediate restraints. If there is any chance that you will need to break apart mid line you add a stable knot at each intermediate and can simply break between any tie.
True and this may help if you just want to detach 1m of cable from one end (perhaps to route it another way). But replacing one cable in such a bunch is either a nightmare or a serious time sink, depending on how you look at it.
Zip ties are cheaper and faster, velcro might not be cheaper but still faster and a lot more flexible. This being said if I want to send a rover to Mars (so definitely a final install) I will not use zip ties :).
Only if you are speed lacing and do not knot the intermediate restraints. If there is any chance that you will need to break apart mid line you add a stable knot at each intermediate and can simply break between any tie.