I wonder if there is an interesting lesson learned here for future language maintainers. One of the reasons for the 14 year deprecation windows (imho) is that

I wonder if there is an interesting lesson learned here for future language maintainers. One of the reasons for the 14 year deprecation windows (imho) is that the language maintainers didn't have control over much of the core platform libraries/ in everyday use. This created a lot of community angst against the upgrade path.