Is traya becoming a thing of past along with Hsith?

There will be more Sith and there will be more Jedi, Rebels and everything else. It's a big wheel cycling around and everything comes back at one point. Traya is one of the best Sith if not the best of all, she will stay relevant. Han Solo and General Kenobi are present till today, they have their places and so will Traya.