[tromp]

You left out the crucial bit:

    Worse: this flow runs entirely through Google Play Services, not the Android OS. Google can change it, tighten it, or kill it at any time, with no OS update required and no consent needed.
    And as of today, it hasn't shipped in any beta, preview, or canary build.
    It exists only as a blog post and some mockups.

[Markoff]

that seems better, not worse, that they don't implement this on OS level, so no gapps users are not affected at all