I was a NYS/NYC resident and domiciliary all year and have NY income throughout the year. My time in DC started at the end of May and I had an abode in DC for more than 183 days, so DC considers me a statutory resident (even though I will not have actually spent parts of 183 days there myself). My DC employment income started in June.
It is not a simple situation of moving from one state to another. I never gave up my NY residence and ultimately, when my job is over in some number of years, I'll go back to being a full-time NYS/NYC resident.
So NY might have been my original state, but it is not my "old" state in the sense of "former."
