A modern programming language that makes developers happier.

kotlinlang

okay I’ll take a look :slightly_smiling_face: 

So it seems that in the end we’re talking about tradeoff  between ease of writing custom operators and performance, most likely general purpose async machinery won’t be as effective (execution time and memory consumption) as RxJava2 with all the manual optimizations

For sure, not lots of users will feel that performance penalty, but my point is that not lots of users will feel need in writing custom operators as well.