ReCAPTCHA v3, the version I was referring to in what you quoted, doesn't have an audio CAPTCHA or any kind of fallback option at all, which is part of what makes it so much worse than v2. (The other part is the privacy implications of adding thorough behavioral tracking to every part of a website.)
Curious. Do you have any example of a site using it? I noticed that reCaptcha has become much, much worse recently and I assumed that this must be this v3, but I've never encountered one that would actually have no fallback and prevent me from using the site.
I delete all cookies outside of a few whitelisted domains every time I close a tab, which is why reCaptcha is so annoying to me in the first place. Still, at least for me, the audio fallback is always there and much less annoying.
Never happened to me. I've been getting "point out the hydrants" over 5 times in a row sometimes because of the amount of anti-tracking I have set up, but the audio option was always there letting me on the first try.
Or, for absolutely everyone: pretend you're blind and click on the audio captcha option. It takes seconds to solve and is trivial 90% of the time :)