> Try running their products on a more recent JVM.
Isn't JDK17 literally two or three months old?
JDK17 was released on sep 17 2021. Meanwhile, IntelliJ 2021.2 was released on July 27 2021, and IntelliJ 2021.3 on November 30 2021.
Who in their right mind would dump a stable LTS release in favour of the latest and greatest in the middle of a point release? Specially on a production project which is expected to be rock solid, and quite possibly wouldn't be able to recover from a reputation hit caused by regressions introduced by hasty ill-advised migrations?