I assume so. Do you mean that if they wait beyond the 10 years, it would no longer be possible? That I don't know. But in the case of Sweden you can vote at the embassy, you can vote by mail. You can't use proxy voting but you can vote in Swedish local elections if you're away, based on the locality that you live in, so they've gone out of their way. I can't imagine they would refuse somebody who let it expire after 10 years. It's just simply that you're supposed to renew your communication with the electoral authorities.
There are other countries that, I think, equally go out of their way to make it easy.