It's a shame because the thing that kills alternative platforms is getting flooded with racists to the point that they drive everyone else out.
A lot of "free speech" platforms box themselves into a corner by declaring themselves "free speech" platforms while intending that to mean they won't ban users for mild wrongthink, but then white supremacists show up, and if they get banned then they start causing a massive shitstorm over the fact that the platform isn't truly supporting free speech. Then they drive out all the normal people who don't want to be associated with them and the platform is forced to shutdown.
Then you have morons like Tim Pool who will endlessly attack "free speech" platforms if they ban white supremacists.
The vast majority of people aren't even going to know or care. A lot of people will probably just continue on even when their adblocker becomes less effective. Of course the type of people who use adblockers are also more likely to wonder why their adblocker suddenly became less effective and then switch to a browser where it's more effective.
It takes a lot to change the inertia that already exists. People have been predicting the rise of the Linux desktop for at least a decade now and it still hasn't really caught on.