Been listening to it for years, it's great stuff!
Isn't what you've described basically BBC Radio 4, or any of the NPR stations?
Like, say I'm interested in true crime or D&D or behavioural economics, there's a bajillion podcasts out there on each topic and discovery is inefficient and time consuming. Instead of subscribing to podcast creators, I want a DJ to just have an audio stream going on at all times where I can just tune in when I want and it's something interesting being played.
If you strip all the interesting parts of a concept (here curation, the dj personality, easy instant access, centralization, community, ...) it's going to sound lackluster.
Though personally I'd enforce synchronous listening if I ran that kind of service myself. Lots of radios have talk shows and listeners do just fine joining in the middle of a conversation.
Actually I think that may be ClubHouse's future - if it survives.
Indie radio stations do the same and usually have a podcast “episode” per week with curated content