She's made a few sporadic appearances in stuff like the recent Elektra volume, Spider-Man/Deadpool, and even Amazing Mary Jane.
She's sporting a new, anime-style, hairdo with twintails.
Sable still gets some use every now and then.Silver Sable: I always found her an oddity in Spidey's world, but the Black Cat stand in was pretty fun. Shame that she couldn't get her own mercenary type book as I think she actually can carry a title.
And in the Ravencroft book and Last Remains.
Uh...Sometimes it's not a bad thing for supporting characters to be shelved and left standing. Not everything has to be harvested and mined. Skurge the Executioner had an iconic moment in Walt Simonson's run on The Mighty Thor and nobody has gone ahead and returned Skurge from Helheim.
(Admittedly he was left to rest in peace by the end of this series).