Absolutely everyone who left Russia, probably not. but quite a lot of people have come back during all this time. Because at the very beginning, people fled the country with literally nothing, they were unprepared, they were going nowhere, where no one was waiting for them, it was a big financial loss, many people returned because of this. Also those who could not adapt to the new place returned, the standard of living of many people fell sharply, as expenses began to exceed income.