> This is one of the reasons why it takes so long for projects to migrate from Java 8 to Java 9 and beyond.

EDIT: Oh, just realized... it's probably a misunderstanding on my part. "Java 8 to (Java 9 and beyond)" is the intended reading, probably. My bad.

----------- DO NOT READ BEYOND THIS POINT ----------

Maybe it's just a phrasing issue, but...

The Java 8 -> Java 9 (or 11, in practice) transition was special in a few ways (modules, mainly), but I don't see why any future transition should be quite as disruptive? Do you have anything concrete in mind, because if you do, I'd like to know about it!