These, collectively, are a great resource. We aren't thinking of relocating, as the OP is, but can perhaps ask for some insight from expats in Greece, about the up-to-the-minute actual situation there, regarding availability of euros and other realities of daily life. We will be going to a wedding on Mykonos this month, and have no idea what kind of shortages we might want to prepare for.
If anyone on this forum has been to Greece within the last few months, or is in touch with people there, I'd appreciate any knowledge you have. Last month, because of the complete halt to imports, wineries were unable to bottle their wine, because all the bottles are imported. We don't know if that situation has been resolved, but in our book, that would be a real Greek Tragedy!