Sure, a well-known process.
I think in the Baltic states this is magnified by population decrease and internal EU migration.
Population:
https://www.worldometers.info/world-population/lithuania-pop...
I think the population decrease numbers can be multiplied by 2 if you take EU emigration into account.
I see it as the biggest long-term problem Lithuania is facing. The country is not that big and crowded to begin with, and in 20-30 years it's projected to be even smaller.
And the society is just not ready for the obvious solution - immigrants.
It has been happening for decades, all over the world.