[MegaDeKay]

It can be used to find connection points to signals that would otherwise be inaccessible or at least hard to get to. This has come in pretty handy for the latest wave of Nintendo Switch hacks like Picofly. The scan-sand-scan approach [0] has the advantage over this hack where you can do something like the "kamikaze mod" [1] on the OLED Switch since you know where stuff is, not just what is connected to what.

[0] https://balika011.hu/switch/lite/

[1] https://www.youtube.com/watch?v=LMnS7yfu3Qk (not for the faint of heart)

[abricot]

Wow, grinding through 2 layers of PCB to get to the third. That takes dedication!