Exactly, don't see any reason for SCOTUS to capitulate to Trump. Trump is ahead right now, he needs to win a recount in Arizona or pull ahead in Nevada. Maybe they could halt all counting in Pennsylvania to maintain his lead there, but otherwise Trump's paths to victors require recounts or continuing counting in the pending states. So SCOTUS would actually have to throw votes out or make mail-in voting unconstitutional or something. That would be such an outrageously political move by a bunch of new political appointees that it would ruin the legitimacy of the state, endangering the very power of those SCOTUS justices.

But alternatively, they can just hand it to Biden, and remain in their seats until they die. Meanwhile, Biden will do nothing to them, has no power without the Senate, and wouldn't pack the court anyways. So why take such a risk on Trump? Might as well give it to Biden, what is Trump going to do either against you or for you? You already have your lifetime appointment.