I tend to agree with both
@michael and
@anotherguyTN. It's my opinion that Dr. Demento didn't kill novelty music. To the contrary, he gave it a platform and got more exposure for that genre and those songs and artists than would have been possible without his program. That said, "novelty songs" don't really fit into any radio format, aside from maybe a few that get tossed in during morning shows here and there, or used as bumper music on occasion during talk shows.
Another problem with shows like Dr. Demento's is that, while he may have been popular in the 70s and 80s when he was carried by many CHR stations (my local station aired his show on Sunday nights from 10 - midnight), it's tough to keep up the same schtick each week with many of the same songs and the "funny five" and the sound effects and all of that, and remain relevant after a number of years. From what I recall, his star started to really fade when many of the mom and pop stations that carried him were gobbled up under Clear-Channel and other larger corporations, who didn't really see a place for his show in the formats they were airing. At one point, he told the remaining stations that carried his show that they couldn't air his program via their streams, only OTA. That, of course, caused them headaches as they now had to air his program OTA and pick different content for their streaming platforms and that caused many of the remaining stations to drop him. Last I heard, as of a few years ago you could only access his programs through his website. You could purchase individual older shows or there were other subscription levels, including for those who wanted to hear a new program from him each week, which he was still creating and producing.