Another idea for a stripe scarf is to make it wide enough so it can be folded in half along its length and then sew all along the long edge… and use fringe to hold the shorter ends closed. Hope that makes sense. The perk to this is - even though I know this is “bad” - you can just tie all the ends of yarn together to keep them from unraveling and then everything is hidden inside when you are done. (You’re not supposed to ever tie knots in knitting but I, um, don’t always follow that rule…)
Make it as long as you want and change stripe colors whenever you want.
I made a scarf like this years ago and it was nice and toasty warm for winter. It’s about 6 feet long and looking at it it seems to be 48 stitches across… I used big needles, maybe 10 1/2? All in stockinette stitch. Been a long time. Still love that scarf for cold weather although I never liked the hat I made to latch it.
Of course if you are going for a fashion scarf this may not help you.