Per https://admin.phacility.com/phame/post/view/11/phacility_is_winding_down_operations/
All customers are encouraged to migrate to another software platform.
Phacility will nominally continue to maintain Phabricator, but it will no longer be regularly updated. There will be no way to request new features.
KDE already hosts our own instance, so in that regard we are already protected from the shutdown of Phacility.
With regards to migrating to another platform, reviews have already been transitioned across to Gitlab.
It is likely that in the coming months we will migrate tasks across to Gitlab as well (once CI has been transitioned, as that is more pressing at this stage).