While granting your point about strength under pressure w regard to Russification, how then do you explain the disappearance of Estonian use in the free world, meaning among the second and third generations abroad? Most visible in the declining numbers of participants at esto events - even at that hotbed of education, Tartu College,where they seem now to only organize English language lectures...

You exaggerate with respect to Tartu College. There is an (ever-shrinking) group who love the Estonian language and learn it, simply because it's beautiful and we love to bask in that mystery.

Residents of the English-speaking world have little incentive to acquire proficiency in a second language. That's even true for the progeny of immigrants (after Grandma has died). There's nothing mysterious about this.

What's mysterious is the nature of personal identity among those who claim to be fierce Estonian nationalists, yet, have little interest in the language.