@sclower There was definitely a radio drama revival in this country in the '70s and '80s. I think CBS Radio Mystery Theater did a lot to fuel interest, as low budget as that show sounds today, and maybe Zero Hour helped to get that whole thing started. There was also Sears Radio Theater, later becoming the Mutual Radio Theater and the Mystery Theater spinoff called the General Mills Radio Adventure Theater, a similar show for kids hosted by Tom Bosley. In the late '70s we had Alien Worlds, which had too much narration but good stories and fabulous soundscapes. NPR made lots of contributions to audio drama, as well, with EarPlay and the Star Wars trilogy, not to mention Bradbury 13 and importing some drama from the CBC. It's tempting for me to blame today's lack of radio drama on the tons of streaming services and podcasts but England has access to the same services so that can't be it.

@Thumper1964 But why is it different in the U.K.? Folks over there have access to cell phones, social media and streaming services just as they do here.
I think another factor was in the '70s and '80s you still had individuals who were veterans in the field, such as Hyman Brown. Nowadays, there just aren't as many of them still around. Also, in the 70s television, as big as it was, still only consisted of the three major networks, PBS and a few independent stations in each market and so I think there was more room for people at that time to still get into radio drama. It obviously isn't dead since you've got production houses like Big Finish which are making money and not even from a general audience, not to mention the tons and tons of audio theater being produced directly for the Internet and there seems to be no end in sight for that.