Will young speech markers one day become elderly speech markers?

Even though I'm nearly 30, the features that mark my speech as young and female aren't going away. I still use upspeak. I still "like" quotatively and as a discourse marker. I still use "awesome" for things like youtube videos. I still use "dis" in casual conversation - I'd never use it in a translation, but I'd use it when explaining verbally why a word choice in a translation is unsuitable. "It makes it sound like he's dissing him." This isn't going to change. This is my dialect. And I've noticed that it's here to stay in many, if not all, of my peers.

These speech markers were used by teenagers who were cooler than me when I was a child, and my peers and I absorbed them by emulating the cool big kids. That means the early adopters are now at least in their late 30s-early 40s. It's possible there are even older early adopters who grew up in places that are on the cutting edge of linguistic trends.

Their dialect likely hasn't changed and isn't going to change. They still talk the same as they ever did. So in another decade or so, a quorum of working-age adults are going to upspeak.

I don't know if younger generations also upspeak etc. It might be too soon to tell. If they do, it's going to read as unmarked a generation from now. If they don't, in 30 years or so it will read as old lady talk. And in the interim, it will just read as people of a certain age trying to be friendly and perky, like how currently certain women of a certain age seem to deliberately modulate their speaking voice to make it more...melodious, I suppose...when they're trying to be friendly.

***

When writing a sentence that ended up not needing to be in this post, I started talking about how we wouldn't use upspeak et al when arguing a case in court, because it's non-authoritative.

But this made me realize that I use it in contexts where I'm speaking non-authoritatively to specifically designate that I'm being non-authoritative. When I have to be authoritative, I speak authoritatively. When talking to my peers or doing business or just having everyday social interactions, I'm not speaking authoritatively so I use my non-authoritative natural dialect. I sometimes even exaggerate my speech markers in situations where I'm emphasizing my lack of authoritativeness for social lubrication

So this makes me think that we used it with greater frequency as teens because we didn't really have any reason to be speaking authoritatively. Our parents might have wrung their hands because they couldn't picture a person arguing a case in court while talking like that. But would parents actually want their teenagers talking to them with the authority of a lawyer in court? If I'd done that, I would have been told either to stop talking back (which is bizarre, because as I've been working on Entitlement I've come to realize that I suffered far more for not "talking back", because my grownups actually did tacitly expect me to even though they told me not to), or I would have been told "don't be smart!" (Unless, of course, I was being told to "smarten up".) For a teen to speak authoritatively is perceived as disrespectful by their elders and stuck-up by their peers. Is it any wonder that we don't do so in situations where we don't have authority?