OpenJDK now required for all formula?

I have been using Java-based tools installed with Homebrew and only LTS versions of Java, but recently found that all my tools are now, instead of requiring that I have some sort of Java installed, are now installing multiple non-LTS versions of OpenJDK.

Why was that change made (since I can’t find any discussion of if in GitHub or here)?

Because homebrew installed software works more consistently if it can depend on homebrew formulae and recently someone made formulae for openjdk. This means we can now depend on those. While using LTS software isn’t really the way homebrew manages it’s packages, JAVA_HOME can still be set to whatever java version you want.