But NOT ALWAYS
Just saying what they posted - incubator doesnt mean WILL be in the JDK eventually from what they wrote. It may - but it may stay in the incubator for a long period as “proposed functionality” and may never become “standard”
And nothing wrong with that as people who want to rely in “proposed” functionality can - this that dont can choose not to
It seems designed to make it possible to move proposed function out to the world for a wider review WITHOUT having to put them IN the JDK
not necessarily a bad thing