Re: The future is behind you ....
Actually, radio is inherently analogue. Even when you have created your digital multiplex you still transmit it using an analogue process because those radio waves are um... waves. How much simpler to just modify, say, the amplitude or frequency of one of those waves.
For AM all I need is an oscillator and an amplifier. Feed in the signal I want to transmit to vary how big the output is and Robert is your mother's brother.
For PWM its even simpler because I only need to transmit two states (big wave & small wave at the same frequency)
For FM I just control the frequency of the oscillator with the signal I want to transmit. This is very wasteful of bandwidth, which is why it is restricted to VHF.
No Computer. No complicated electronics. To transmit a DAB Mux I need all the stuff you mentioned PLUS one of the above analogue processes.