We have lived for 25 years with the seekdir bug, and even if it’s now on slashdot this does not mean we will immediately patch it. Besides, bringing that part of libc in sync with OpenBSD will involve libc and libpthread shlib version major bumps, which is a bit overkill for this diff.
It will go anyway with the upcoming merge of more recent OpenBSD base code. There are more pressing issues. But I have looked into it.