They (Burns and Allen) started on the Vaudville stage as a team, moved to radio and then TV. It was a good run.
As for radio to TV, there was a kids show on radio where the host would call out 'Froggy the Gremlin' and your imagination supplied the little green character. On TV, it was a rubber frog bouncing up and down. Yeeechhh.
Also on radio, when the detective overvoice said, "The most beautiful girl in the world just walked through the door." You knew exactly what she looked like because it was your version. On TV, it was some producers third cousin or sqeeze...
Oh, well...
That why model railroading is such a great hobby. You supply the imagination.