The Kikkoman gluten free variant is also labelled as tamari.

For me I always have Kikkoman in the fridge (especially because thats what wife grew up with) as the staple soy sauce. I like to dabble in having 1-2 other variants in the fridge at once, but they can tend to have too strong a flavor for some peoples taste. Or certain variants are best with certain dishes, etc.

Yes, and Chinese "light soy" is also similar to shoyu.

It does, when it doesn't that's when you call it tamari.

Eh, it depends what you mean by traditional. Ramen is "traditional" in japan, but it was invented in the early 1900s. Similarly, since wheat wasn't commonly imported into japan prior to the 1800s, most actually old tradition recipes didn't contain wheat either.

buldak ramen introduced me to jjajang. I stir fry 1 of them and one 2x spicy together with green and yellow onion, red pepper, garlic, ginger, and whatever leftover protein I have from the week. top with some type of Lao Gan Ma and there is basically no reason to ever order takeout

Almost all wheat based soy sauces has such a low gluten content that they can be seen as gluten free.

The block to hang up outside for air drying is called 메주 (meju) which is form before made into 된장 (dwenjang). There is more process involved to make it into dwenjang. Actually from that meju we make daenjang and soy sauce.

I've really come to appreciate daenjang more than Japanese miso over time. It has funkier, earthier but arguably less refined taste than Japanese miso.

Western tastes favor intense flavors, so tamari may provide better balance than standard (koikuchi) soy sauce in that sense, but in Japanese cooking, "richness" is not necessarily a desirable characteristic, and tamari would overwhelm many dishes when substituted for koikuchi in similar amounts. Reprocessed (sai-shikomi) soy sauce, made by fermenting soy sauce twice, is considered a middle ground between koikuchi and tamari in terms of richness and is popular for dipping. But there is also a relatively wide range of flavor within the koikuchi category, and the US-made Kikkoman sauce that many people are familiar with is not very flavorful.