[frowaway001]

Reliability, performance, maturity, instrumentation, diagnostics.

Just picking one example from the list, performance: How is GHC's runtime dealing with 100GB+ heaps?

[sixbrx]

Do the Oracle or OpenJDK JVMs deal well with heaps that large? I have no interest in other JVMs because my employer would not consider switching and I can't say I blame them.

[kasey_junk]

It depends on what you mean by "deal well with heaps that large". You can certainly set them that large with no problems. But given your memory patterns they can cause dramatically bad GC times.

[frowaway001]

Yes. It's routinely done.