perhaps, as both great enchanters and great engineers, they used both?
Well yeah, perhaps, but, why?
If you have soul-gem powered radio compared to your own innate magic prowess driven telepathy..
It would be like lighting a fire with a tinderbox when you have a zippo.
Magic takes time and skill to master. Flicking a switch does not.
I suppose it is possible, but I would say the easier option was prevalent where the magical one could maybe have been a childrens game, a way to have absolute privacy or other exotic reasons.