plenty of public data at this point. Right-wing politician / figurehead social media engagement has tanked, which is the most obvious and self-verifiable signal I can offer.

Here's a news article if you prefer it.

https://www.thelondoneconomic.com/politics/reform-figures-se...

Richard rice is an example given in this one, engagement from thousands of likes etc per post, to less than 100. That obviously isn't an isolated instance and converts to less insane comments in other areas of the internet as well. You suddenly have a hard time finding previously incredibly common bad-faith actors in most political discourse comment sections.