The fact that power of speakers matter is very valid while those speakers are centered on the ethnocentric level of care, or lower (see eg Integral theory by Ken Wilber: Loevinger; Spiral Dynamics etc). But when society as a whole develops, they care more about other groups and humankind as a whole. Then it is much easier to do adopt a lingua franca than serves them all rather than just forcing smaller nations to use language of the hegemon of the time.



Totally!
And probably a multi-tier EU would be great too! Imagine Ukraine being able to join it’s next tier already next year instead of waiting for 3-5 ears to get the full membership.