Cancel culture is primarily a problem with mainstream/pop culture. The "underground" today is more vast and diverse than it has ever been.
Instead of zines there's a million or so blogs and forums and newsletters.
Podcasts are an entirely new realm and only a tiny sliver of it cracks the mainstream.
The number of outlets for "TV shows" has exploded, so there's plenty that comes and goes without any significant mainstream exposure.
Much of the above is created on an enthusiasts budget for a tiny audience.
And I'd argue a lot of the above are exempt from "cancel culture" if only because most people don't know they exist.
Have we accepted censorship just like that? What is next, coded language to escape the thugs?
I think a lot of conservatives are mad about "cancel culture" because now they're being targeted by purity movements instead of the punks and freaks and hippies and queers. I say tough shit. Overall, the realm of acceptable discourse has expanded considerably and is arguably larger today than ever before. If they think their particular viewpoints are being unfairly suppressed, then do what everyone else did and go underground and do the work of bringing your views to the mainstream.
[1] https://observer.com/2011/06/paul-graham-outlines-the-mosqui... (and he also has an essay that I was too lazy to find about startups) [2]https://gainedin.site/trends
The first draft of an actual underground which can't just be shutdown by attacking a server is https://getaether.net/ having build up on the lessons of freenet and bittorrent.
It isn't the be all and end all, but it's a huge step forward.