I believe it is about rewriting implementation, not removing API [0].
> Deprecate, and consider removing, XSLT
> The consensus last time we considered this was that xml and xslt are too important for enterprise and we cannot remove them from the platform. Closing this bug to match that reality. We'll open a new bug if we ever decide to do this. [1] (Feb 22, 2019)
> Deprecate, and consider removing, XSLT
> The consensus last time we considered this was that xml and xslt are too important for enterprise and we cannot remove them from the platform. Closing this bug to match that reality. We'll open a new bug if we ever decide to do this. [1] (Feb 22, 2019)
[0] https://news.ycombinator.com/item?id=24767500
[1] https://bugs.chromium.org/p/chromium/issues/detail?id=514995