The CSSWG resolved to rename the `inset-area` property to `position-area`. See the CSSWG discussion here: https://github.com/w3c/csswg-drafts/issues/10209#issuecomment-2221005001. The new property name, `position-area`, as a synonym for `inset-area` shipped via https://chromestatus.com/feature/6567965055778816. This entry is for deprecation and removal of the `inset-area` property.
With the CSSWG resolution on renaming the property to `position-area`, this deprecation will clean up the implementation in Chromium for a standards compliant feature.