Fair point. The "with ease" part has also to do with Java's ecosystem. For instance, Martin Thompson used to teach people how to write a single-producer-multi-consumer queue. In a matter of hours, people can achieve 100M+ reads and writes on a 2014 MacBook Pro (I understand that throughput is different from latency, but given the fixed number of CPUs in this case, the latency of such implementation is also phenomenal). Better yet, Java folks have libraries like JCTools, so they don't event have to spend that few hours to get even higher performance.

My litmus test is how fast one can implement functionalities of the data structures/algorithms in the book The Art of Multiprocessor Programming in production quality. It looks chic languages like Rust are not there yet.