It's also not 1988 anymore, so the "Religious Right" is about as relevant as the Free Silver movement.

The point is not who's currently relevant, it's that people on the cultural Right complaining about cancel culture are on par with a schoolyard bully complaining about someone else bullying them. They are happy to do it when their opinions hold sway; when they can't, they whine about other people doing it.

And to be clear, I'm not taking a "both sides are equally bad" stance, I'm just describing the hypocrisy of this particular line of complaining.

This selective application of values (e.g. being in favor of free speech, as long as you like what is being said) has been going on forever. We have had a system set up to account for this in the U.S., when the perceived threat to free speech was the government. That threat has become faceless mobs and private companies.

The religious right elected Trump. Without their support he would not only have lost the popular vote, but also the electoral college.

He spent his presidency attempting to keep them happy and in particular working with them on Supreme Court appointments.

I would say that makes them relevant.