At a rough guess the first stage of it (windows only) is about 2 months away
It's taken a long time to get it perfect, as is the nature of multi threaded code, but it will be worth the wait
This thread was added on April 10, 2020, with posts from Darkimmortal.
Original Post
/r/runescape/comments/dd857t/pretty_sure_runescape_is_the_only_game_in_2019/