We're currently checking preserve-3d in lots of places, which makes it harder to reason about making changes to it.
<rdar://problem/102632513>
Pull request: https://github.com/WebKit/WebKit/pull/6768
Committed 257093@main (d081a7fd93a9): <https://commits.webkit.org/257093@main> Reviewed commits have been landed. Closing PR #6768 and removing active labels.