Everything’s smooth on my system. that said, i’ve had crashes many times, but thats understandable when a project grows almost out of control.
Most issues for me arrive when a project reaches up to 40^ 'ish tracks with tons of midi and audio edits, automation etc. Thats when things turn freaky, and you can almost feel the impending doom with glitchy white graphics and audio sync issues. then. crash!.
Problem solves itself with a restart of cubase, but, thats why ive set the backup interval as close as possible and I always save, save save save. project name nr1, 2 ,3 etc. thats in my experience the only way to be remotely sure incase something goes wrong. ive used logic before and reason, you can never trust a daw comepletely, doesn’t matter what version or os.