We may live in a society without a counterculture. We have many, but not one dominant one.
I also worked in physics most of that time, which is probably a subculture there as well (some overlap I suppose with a broader subculture of non-profits workers).
I also lived in Utah (Salt Lake City), where you are effective a subculture (counter culture) almost by virtue of living there and not being LDS.
None of those are homogenous, but all are counter to the prevailing culture - which is the much harder thing to define.
Which is my point - we don’t even have a prevailing culture, and we never really did, not a universal one anyway.
That said, it’s likely that white/christian/suburban/nuclear family was considered the prevailing culture though. That’s a subculture today - albeit an unusually powerful one.