Love my classic, it currently hold alllll my music and stays connected to the home stereo (basically replaced the CD player). I also take it with me to work from time to time when I get board with the goto power playlist in my phone. If I ever hear confirmed news that they are killing them off I will go and get a second one as a back up, as I think they are the perfect music servers/ storage devices. I've had many external drives (back ups to the back ups) fry and crash on me and in the end through all that my music has always been safe in the classic.
Oh yeah I have an old maxed out 60gig that is permently attached to the car stereo.
Are they (ipod classic as we know it) doomed in time yes.