Yeah, that's something I've thought about for awhile now. I highly suspect at least WandaVision and Loki's show to be one and done. Falcon and the Winter Soldier could go either way. Hawkeye, too, if only as a segue to the Young Avengers series/films. However, the other shows, such as Moon Knight, She Hulk, and Ms. Marvel, I expect to be ongoing as long as the viewership supports it (however Disney will gauge the audience). Even if Young Avengers become its own thing, I'd imagine Ms. Marvel continuing on her own.