There is not really a reason that there should be only a few cubes in one category, Im trying to make an accurate list, not a small one
No, and
big no. The YLM became pretty much everyone's main as soon as it came out aside from some people who hated the feel. After modding the YLM is easily comparable to the Volt v2 and I would wholeheartedly say that the volt v2 is in fact not objectively better than the YLM. The performance is neck and neck after modding the YLM and it's not even that hard to do. Not to mention the YLM does not break at all. The volt v1 has obvious issues with edges breaking but a friend bent an edge on the v2 so the structural integrity is not guaranteed with the volt but it is with the YLM since I have not heard of any pieces breaking, even after modding. The only reason that I main the volt v2 is because it tolerates my turning better, but I might try the A mod and see how that works for me.
BTW here is a tutorial on how to mod a ylm square-1 with the B mod just to show how easy it is to do with basically any knife or similar blade.