A few more points:
1. Since both Germany and Britain maintained embassies in Dublin, Ireland became renowned during the war as “one of the whispering-galleries of Europe and a natural centre of for intrigue and spying of every kind.”
2. Fuel was so scarce that private motoring virtually ceased by 1943, and even public transport was problematic.
3. The War threw Ireland back into a state of almost complete cultural isolation.
4. In some odd ways the existence of Northern Ireland as ruled by Britain increased the autonomy of the rest of Ireland, which otherwise might have been commandeered for naval bases and the like, and might have been drawn into the conflict as well.
5. Ireland did receive Marshall Plan aid after the War, and this began what turned into a long-running process of integrating the Irish economy with the other economies of Western Europe.
That is all from E.S.L. Lyons, Ireland Since the Famine. This book is difficult to read for two reasons. First, the print is too small. Second, the author wastes no time regurgitating “the usual” from all the others book on Irish history. On a given page, most of what is on that page one learns, and thus the book is slow to read. Which is a sign of a very good book, though do note it is quite the time commitment. One of the more essential books on Irish history.
Here is my earlier post on Ireland and WWII.