[shellac]

Java has two somewhat related projects in this space, and it does add a substantial cost to language changes (assuming you commit to keep expression trees up to date). https://openjdk.org/projects/babylon/ is the most interesting to me, as a linq+++ potentially.

[pjmlp]

Yes, being on both ecosystems most of the time, means I get to have lots of nice toys both ways, with them counter influencing each other all these years.