vadio, questions regarding residence and domicile are interesting. Even though you had to give up your VA license by law there would have still been legal possibilities for you to keep a US licence, had you really wanted.
Taking the example of nomads, what they normally do is pick a state as their US domicile, they have a range of US states to chose from. As you can imagine the most common states they pick are ones with no income tax e.g. Florida,Texas, South Dakota. You can rent a mailbox in these states and register all your documentation to it i.e. voter registration, driving license, financial accounts and taxes. Even though they are practically never physically in the state it is their US domicile for all intents and purposes. This is a completely legal method from what I've read.
A US citizen abroad is similar to a nomad, and could easily also pick a US state as a domicile, thereby keep all ties to the country intact. To what extent you want to go to depends on your personal circumstances but there is normally always a legal approach that is possible.
Defining domicile and residence is tricky, and going back to the driving license I like how NY DMV website mentions it:
A judge considers the law and the evidence of your intent and decides if you are a resident of New York State........ DMV does not decide if you are a resident of New York State, if you must get a NYS driver license, or if you must register your vehicle in New York State.
If it would ever come down to it, (which for most people with nothing to hide it never would) it is ultimately (at least in most states) a decision of a judge to define your domicile and residence, not the DMV. A judge would hopefully take your personal circumstances into consideration.
Personally I also find it quite sad
![Cry :\\\'(](https://www.talk.uk-yankee.com/Smileys/classic/cry.gif)
when US citizens abroad cut all ties to their country of birth because the US is very much a citizen and not resident oriented country. You have a right to vote for congress, senate and president in the most powerful country in the world no matter where you live in the world. A citizen of e.g. Denmark loses their Danish voting rights as soon as they leave Denmark. Being a US citizen abroad is more than just having a US passport hidden in a dusty cupboard. You have rights, use them !