In Europe larger companies are having all sorts of trouble with large numbers of switching mode power supplies on 3 phase supplies which can raise the neutral current above that of the largest phase current.
So maybe they need to distribute 127/220V or 133/230V or 139/240V around the data center, if they are unwilling to get the low harmonic PSUs, or are unwilling to upsize the neutral, or are unwilling to string up separate neutrals in each phase.
Or there needs to be PSUs designed for 400VAC (and 480VAC might be nice, too).
Of course we in North America can just connect our trashy PSUs line to line at 208V and push the neutral harmonics to the next transformer upstream after the first delta-wye (if the circulating currents in the delta primary isn't a problem). Hopefully by then it will be large enough that all those triplens will not be a significant total. REALLY large data centers won't have that option.
Newer PSUs are supposed to be much lower in harmonic current content. If manufacturer specs are to be believed, the good ones are lower. The cheap $3 ones from the middle kingdom could be a problem.