I hope it is joke. Endless Java GC problems with any large system (cassandra, hadoop, websphere and so on and on) despite decades of work from top major vendors like Oracle, SAP, IBM etc tells a different story. I have seen enough "Enterprise Scale" java systems which would die of Out of memory error before even "hello world" is served. Though "Java runs huge systems" type thing work for those who wouldn't know most of these huge enterprise systems do not run as single JVM process.

As a user of system that shits everyday except weekends on a 128GB of heap, I am not gonna buy that "oh these microservice kids do not know enterprise scale systems." I have seen both and not an uncritical fan of either.