[pjmlp]

Note that it is very simplistic to say Java has a compacting garbage collector, between Oracle JDK, OpenJDK, Temurin, Azul, PTC, Aicas, microEJ, OpenJ9, GraalVM, Jikes RVM, and the cousin Android, there is pleothora of GC configurations to chose from, that go beyond that.

[whizzter]

Not to mention that many of them have multiple GC's that are selected as startup options.

Personally though I can't wait for Azul's patents to start running out so that OS vendors can start implementing similar machinery into mainline OS's for all runtimes to use.

[pjmlp]

Unfortunately that problem is cultural, not patents.