I would add that I have always been of the opinion (being an opinionated bugger) that the days when flying without a radio was considered safe are long past.
Yes, I had an odd feeling the other day. I've had time off from gliding to do my PPL, night and IMC and now the thought of sitting in a glider just outside of controlled airspace and not listening to somebody on the radio seems kind of strange. Even though it hasn't bothered me for the last twenty odd years.
I suppose it's a bit like mobile phones, you managed quite well without them but now you feel half naked if you don't have it in your pocket.