Most of the times when I interact with the address bar it's either to go to a different site, google something or copy the url - in all of those use cases I interact with the entire address to either replace it or select it.
I would wager almost anything that this is the case for the vast majority of regular users because most of the ones I've interviewed (N = 31) for a uni UX study didn't even know how to read URLs for the most part - especially not after the ? query part.
It's sad but true. Googling is probably Firefox's only feature left. After they trashed the dev ecosystem, removed file access, prevented 127. access and prevented ssl bypass for 10. and 192.168. broke markdown rendering, disabled CD access, made development painful, fsckd ftp, banned useful stuff on file:// removed anything useful from about: made developing inside Firefox a nonstarter, borked Web app, and generally broke any use case other than Googling/Shopping.
I doubt many people type much into the omnibar other than input for advertising platforms.
I would wager almost anything that this is the case for the vast majority of regular users because most of the ones I've interviewed (N = 31) for a uni UX study didn't even know how to read URLs for the most part - especially not after the ? query part.