When guitars.SE was merged, music.SE had already decided what kinds of questions to field (which I absolutely do not disagree with). An unfortunate consequence of that is that the guitars.SE community subsequently had no say in what questions were on or off topic (unless you were following both proposals of course).
Recently, there have been a rash of closings on questions that the moderators of music.SE believe to be off-topic here, but they were considered on-topic in guitars. The reasoning behind some of the closings where completely valid (shopping questions, etcetera), but others were simply closed as "off-topic." A good example of this is this question. From what I gather, this question was labeled out-of-scope of the site, but I respectfully disagree. Questions related to how to set up pedalboards, amplifiers, and effects should most definitely be on-topic or you risk reducing the value of the site to the entire electric guitars community. Lots of folks have no clue how to properly build a pedalboard or how to change tubes in their amplifier so that they don't fry anything. I believe that questions like these have a lot of value, and shouldn't be discouraged just because they cross cut electro magnetics and circuit design. I think that the scope of music.SE should be revisited and changed to include topics such as these as valid.
(Note: If the community decides that these questions are off topic then I will respect that--I'm not attempting to start a "flame war," but I do believe that the guitars community content should be respected. We all worked hard on it.)