Between large web publishing platforms and all alternate browsers blocking FLoC, I think we could kill it, yes. WordPress is used by a lot of marketing focused folks though, so we'll see if WP is able to land this.
I've always been so interested in learning about the next best thing that I hadn't given Wordpress much thought.
Now, using it all the time, it's popularity is very understandable as an interface for people who are not technically savvy to maintain their own website.
I feel like the Wordpress community isn't the loudest, but it is certainly a force. I think, as a brand, this move definitely has me more excited about working with their software.
I wonder if AdWords will require use of floc headers
I don't know, but I guess they won't. Instead, you'll just get worse targeting on your site if your users don't send the headers. Which I think may also not be very popular with WordPress users, but I guess the proof will be in the pudding.