On a human level, I know that I would prefer to spend my last years in peace and with family, rather than grinding out at work, so I find the Notorious RBG’s last years to be a sad thing.
On the other hand, she could have retired during the Obama presidency if there were concerns about the ideological composition of the Supreme Court. By holding out for a Clinton victory that failed to materialize, she and her advisors condemned herself to an attempt to last out Trump. Maybe she can, but maybe she can’t, and maybe he gets re-elected and she can’t, and she’s compelled to keep herself employed while in her 80s with multiple broken bones to support political partisanship.