if I have 400 cables laid out I would rather stick a probe in then go through each trying to read the numbers written in sharpie on each cable (is that a 5 or a 3 ? a 1 or a 7 ? )
off course Im not going to have 400 loose their going to be grouped .
I use the blank panels too , I like them becouse you can install one larger than you need and populate as needed also makes it easier to add /troubleshoot without having to disturb the panel.
I use the datalite to quickly Id cables 100 remotes two colred sending units makes it go quick .
https://www.tecratools.com/pages/datacom/37600.html