>>39804081She's stated in the past that her stream times are lowered because she has to be quiet for her parents. I'd also assume this is why she tries to do chill zatsu before and after gameplay for a bit longer to make up for the shortened playtime.
I'd imagine she might readjust her schedule in the future when she wants to start streaming longer because she HAS said that she wants to do longer (4+ hour) streams. She's a lonely dog.