Standard answer from me ----
Refi the SL through SoFi for best rate. Most SLs have a death or disability clause the makes them non payable should you die or be disabled. From a numbers standpoint, never pay them off. Also, (Hill, Biden, Sanders) may push for some sort of forgiveness or super reduced rate, so definitely don't pay until this election cycle is over.
Death is much rarer than disability at a young age. Disability effects a very large percentage of workers in their lifetimes.
Open an account and label it "Paid Off Student Loan Account" -- make sure it is a middle of the road index account. Then, after your IRA,s, 401Ks, HSAs and Down Payment Account are filled up, fill that POSLA up to the amount owed and let it ride forever, while paying down the minimum on the actual SL.
Short math --
If your SL rate is 4% and your avg annual investment return is 8% you will have around 300K more if you invest rather than pay off in 50 years.
That is about 6K per year for making a 15 minute decision one time. Pretty good return. Would your grandkids rather have 300K and a paid of SL or just a paid off SL?