I think the left is losing ground culturally right now as legacy media loses ground.
New media stars, ie bottom up web 2.0 people like podcasters and youtubers are quickly rising and this demographic seems to skew right - or if not right, at least skeptical of the top down leftism from Hollywood, the NYT, etc.
Likely a flawed analysis, but Spotify's stock price is up over 80% since they signed Joe Rogan, compared to 40% for the rest of the nasdaq. Joe Rogan is a perfect example of someone who isn't exactly on the right but is a very trusted voice for those on the right, as he has featured many right wing and heterodox thinkers on his show over the recent years.
It will be extremely "interesting" if the "right" gained control of the "culture".
To me, such a configuration seems to run against the very definitions of what "left" and "right" means. The "rightwing" culture simply seems to exist as subversive undercurrents in a leftwing environment/platform. Can the right flip the table and gain control of the platforms themselves? If you asked me to bet - I'd say no. Trump counties generated 36% of GDP in 2016, and only 29% in 2020. They are completely cut off from the engine of American growth - which centers on high-tech innovation in the here and now. I don't see them getting any toehold back until they jettison almost all of their social agenda that are repulsive to most people in the professional class. This seems unlikely to me.
With such a fast declining grasp of economics, I don't see the right gaining control of the platforms.
But then I may be too old to understand the real tectonic shifts going on in the cultural landscape of the next generation. I doubt stuffed shirts from 1980's would have given two hoots about yahoos in their garages like Jobs and Gates - and look at who owns who now!
I'm not sure if I see the right gaining control of platforms, but I think the recent deplatforming of various right wing people/orgs has probably given them a lot of interest in doing so - so their parlers can never be taken down again.
However the shift that I'm referring to is probably more like heterodox thinkers slowly eroding the foundations that the cathedral is built on. (the cathedral is a mencius moldbug term which, regardless of you feel about moldbug and his zany ideas, is pretty good shorthand way to refer to the left's cultural power that includes academia, journalism, and now big tech)
I am thinking of all of the left and center left thought leaders who have turned their backs on the woke excesses of the left, cancel culture, subordinating biology to ideology when it comes to trans issues, etc. The open letter in Harpers is a decent list but far more influential people would be included in the list of heterodox thinkers. One thing many of them are doing is turning to fan-funded business models as they feel the likelihood increasing that their bosses will prevent them from sharing their thoughts that might not be useful to the democratic party.
The end result, in my opinion, is that people can detect inauthenticity and eventually take people to task over it.
You can see it on the right. All the dumb elected officials who pretended the election was stolen are getting their shit kicked in as they attempt to pivot to adult mode in hopes they can shoehorn a constitutional sounding way to explain their cowtowing to trump mobs.