thats a good question, as mentioned in the pull text, one can improve the worst case of quickselect by exchanging the median of 3 pivot search with a median of medians algorithm. But its going to be slower on average.
Other options would be introselect (adaptive quickselect) or the tournament algorithm (no idea how that performs, just found it on wiki).
I somewhat doubt we need them, if you care about the worst case than average performance you can always use the slower sorting algorithms already available.