I get why Deltarune streams aren't as popular as Undertale streams. It's so easy to miss the secret boss and egg in ch3 that it's actually kinda cringe when I watch a streamer I like play through it normally, completely unknowing of the sword route. Which results in them having a different experience and perception of the characters from mine as a result.
Speaking of which, so much canon Spamtenna content is easy to overlook, hidden behind a secret or from the Sweepstakes. There are people who will play through the game blind and have no idea the two had any sort of connection. That annoys me a little bit.