This is pretty terrible news.
The SAVE plan has always been a bigger deal than forgiveness of past loans. (As a policy matter. Forgiveness of past loans is a BFD if you are among the indebted!)
I hope it survives via appeals, but I expect it will take Congressional action. It’s pretty gross states got standing because they’d get less money from servicing loans not even owed to them.
https://thehill.com/regulation/court-battles/4737997-courts-block-biden-student-loan-repayment-plan/