Is HURD the true Linux/BSD/UNIX successor?

I've been reading about unix-like systems for a long time. I recently came
across the HURD. In goals, it's similar to plan9; a replacement for the
unix operating system. Except that plan9 wants to only replace unix. HURD
wants to replace all the other stuff. I also heard it's microkernel, like
minix. But is it any faster? What are the pluses of having a microkernel vs
a monolothic like linux, bsd, or unix? What about a hybrid kernel like
windows? Is this intended to fully replace the need for any other operating
system?