A lot of the "slippery slope" confusion in the past couple of articles has been that this "cheap SSH key" approach was built on top of the same standard for "expensive hardware key" (Webauthn). This is great because it means a rich backwards compatibility story across a long history of devices and "expensive hardware key" remains an option for Passkeys. This is unfortunately confusing because Enterprises still need Webauthn for "only expensive hardware key" usage so need options in the standard like "Attestation" which specifies things like "exactly which expensive hardware key vendor was used".
People see this confusion and think it leads to a slippery slope of attestation being required "in the future", but the reality is more that attestation and things like it were required in the past and are optional now because we realize "cheap SSH keys" are good enough for most users (with some standardization and shared "branding").