They're still around (old Cakewalk plugins) as I still have many....
I don't really use them anymore as I've found other solutions to my needs over the years.
I do my best to run fully 64bit, but if/when I need something from the old 32bit world, I still use it. For those I've used, I have very little trouble other than sometimes having Sonar crash when changing song-loaded. No damage done simply re-start Sonar...
But this one, the Soundstage plugin is so unique.... I used to use it often and forgot about it until I saw the Eventide Tverb release notice.... So I'm gonna look for Soundstage as it's probably still installed on my DAW...