Updating to 2.9?

We started a save in 2.8, because We didn't know that 2.9 existed. We have been wondering if it is possible to update a 2.8 save to 2.9, if this is recommended, or conversely, not recommended. Also, if there are any drawbacks to updating a 2.8 save. Or would it just be better to start a fresh save? We are late LV, working towards Our first EBF. Thank you!