The issue would be what happens if russia declares some manner of war on us. Your contributors and maintainers are now citizens of a hostile country who might actually believe in their aims.
I think people have a naive cosmopolitanism that assumes knowledge work transcends state loyalty, but there are reasons that it may not do so nor is it safe to rely on the current model of peace to persist.
USA is major enemy for Russian Federation for decades. Many fighters in Donetsk region came from RF and believed that they are on war with USA. Many examples of their direct speech is available on YouTube.
I personally know some contributors to FOSS, which are helping Russian FSB in their war against USA, by consulting them or by implementing tech to help find dissidents and American spies. For example, Michael Shigorin: https://www.opennet.ru/~Michael%20Shigorin
I think people have a naive cosmopolitanism that assumes knowledge work transcends state loyalty, but there are reasons that it may not do so nor is it safe to rely on the current model of peace to persist.