I have long thought Netflix should offer such a service. Have a sitcom channel that plays constantly from a slowly evolving list. Even better if I could just pick say Seinfeld and get random episodes from an episodic show. I do not want to have to expend energy picking a season+episode, just trying to decompress.

Isn't this just Pluto TV? Like, https://pluto.tv/us/live-tv/633354b63df9700007f6a1b7 is the sitcom channel, https://pluto.tv/us/live-tv/66ba495ffe11e5000881f049/details is the channel of just Cheers and Frasier, etc. Just playing non-stop through one episode after another on a schedule as quasi-"live" TV.

Netflix wants you to watch their own shows, not TV from the 90s that they have to pay licensing fees for.

On the radio side, XM radio has a lot of channels like this. A 70s channel, 80s, 90s, 2000s, 10s, etc.

A lot of black-market IPTV services (the kind with "30 000" channels") will have dedicated channels. A Simpsons channel, etc. where you just get whatever episode it's currently playing.

Plenty of other services do this. Plex has a whole cable-style directory of “live” shows

youtubeTV in my area has a Portlandia channel, non-stop on a loop. Always thought it was strange that was the only marathon channel.

It is nice not to have to pick an episode.

I think they had this feature at some point. It randomly selected something to watch, with a skip to next button.

WatchSeinfeld dot net, works on my TV browser.