There are no more subcultures since what emos? Fashion just recycles endlessly slipping from 70's to the 2000's without anything new ever getting invented, Just endless recycling of what was before. Trends are shorter than ever and they never amount to anything.
Replace subculture with the word 'lifestyle' and you have what we have today.
Neets, for example, Id consider a subculture with things like girlfailure, incels, etc.
Even gymbros have a culture of their own, you have esoteric twitter, dudebroweed joe rogan types, etc
With subcultures, it used to be that they were more constigated to physical places (all these are online), fashion defined, and the ethos was geared towards something. Punk was DIY and anti-prep. Goth has a worship of the concept that we are mortal and all things end, emo was, to get to south park, nihilistic or cynical, or is that goth? etc.
You look at many of these lifestyles and you see the same people throughout them, same personalities, same hobbies or interests, same way of speaking, etc. If theyre not subcultures, we need to redefine the term.
The problem is that music used to be integrally tied to subculture, and now it no longer is.
I used to think websites are what defines subcultures today (le redditor, le epic 4channer), but maybe its something like meme format instead, or political niche.