Is there a 'plain vanilla Debian' version for RaspberryPi-5?

["Rick Thomas" <rick.thomas@pobox.com>]

The RaspberryPI-5 now comes with enough RAM to make it a reasonable choice for a desktop personal computer.  It comes with a version of Raspbian OS that works quite well.  However, I would prefer to have a plain-vanilla Debian OS, because that's what I'm most familiar with.   Does such a thing exist?  If so, where can I download it?

While I'm asking, I hear rumors that the RPi5 can run Windows.  Does anybody have experience with that?  How does it work for you?  Is it compatible enough with PC-Windows for me to recommend it to my friends who are life-time Windows users?

Thanks!
Rick