Word Press 5 has been a long time coming – we were warned about it some time ago but somehow it seemed to go off the boil, and one wondered if it was all a bit of a flash in the pan. However it seems that work is going ahead and we might see something towards the end of this month.
It has been evident in other ways that something was going on because the Gutenberg plug in has been updated frequently so I guess that when Gutenberg updates it causes hiccups in WordPress 5, and when WordPress 5 gets modified Gutenberg needs to catch up.
We wait and see. Rather like the awful Brexit.