Fair enough, I know D has fibers, but I'm not sure how different implementations are between languages in regards to fibers. As for Kotlin it was more of a personal reflection, that is fine if you don't know.
Thanks for answering though, I look forward for this. I shared it accross a number of dev communities I frequent and one joke was "java and lightweight in the same sentence" which made me chuckle since I know Fibers are amazing.