This is one of those cases where German rigidity shows so well. Yes, strictly speaking, .eu is for EU only. On the other hand, the scenario of a country leaving EU was never before tested. Instead of sticking rigorously to the letter in the .eu regulations, how about revisiting the regulation? Nope, that's not the procedure.
(Disclaimer: I'm an EU citizen living in the UK, and I obviously don't like the whole Brexit happening. Due to this I moved my UK hosted .eu domain back to Hungary. On the other hand, if the new EU copyright proposal passes, I'll join the Brexit camp.)
(Disclaimer: I'm an EU citizen living in the UK, and I obviously don't like the whole Brexit happening. Due to this I moved my UK hosted .eu domain back to Hungary. On the other hand, if the new EU copyright proposal passes, I'll join the Brexit camp.)