@DAL208 Datalink is currently used only in the Canary Islands but not mainland Spain. As you say, I think it is the way to go but still "In a Galaxy far, far away".
@Shrimp42 This change is proposed to affect ACC controllers.
Apparently the justification (which I have no doubt is considered valid by an accountant) is that there are already single-position ACC controllers throughout Europe, used mainly on night-shifts and/or in sectors with reduced capacity.
The fact that Ueberlingen was a night shift springs to my mind, but apart from that I wonder if some ACC controllers here have had this type of work at their workplace and if it is safe.