[KingOfCoders]

"and in general there where tons of issues with multi threaded code during the time Java did move to the "current" memory model"

I wrote code or managed Java development teams from around 1996 to ~2010 and I don't remember any problems with multi threaded code or memory models. But of course you might be right if you did run Java on an ARM mobile like the Nokia.

The only challenge I remember with two high load (thousands of write transactions/sec - back then) websites were GC pauses, where we had to hire consultants to help with tuning the GCs on different machines for the high load.