That depends on a lot of personal things. I remember a Ukrainian I personally know, leaving after the 2014 invasion.

When Russia was doing "exercises" at their border in 2022, I asked them in a meeting what they felt (guys living in Lviv). Most of them thought Russia would have done it in 2014 already, and now it didn't make much sense. Only 1 person responded he filled up his gas tank. But in the end, nobody left Lviv right after the invasion.