With the announcement and availability of GNOME 3.26, I know we'll be informed about the upgrade. This task is more of a PSA that yes, we are aware of the new release of the GNOME Stack and have the fullest intentions on upgrading once we deem it to be ready for inclusion. As has occurred with our previous GNOME stack upgrades, this will be either with .1 or .2 releases, so immediate release issues are ironed out by upstream.
Upon these, I'll happily upgrade our GNOME Stack and collaborate with @ikey on ensuring Budgie Desktop works with 3.26 components such as Mutter.