They are so useful as an all round mount. No saddle, good stats and can jump and throw you. You can even put cool hats on them. They are easy to tame aswell, so give them a try. Also very OP in abberation
If you mainly upgrade its weight, set it to wondering and have a rex or something else then you leave it for a while then go back to it, it will have a LOT of fiber and then put that into the rex and repeat, you will never run out of fiber