What's that? Can't hear you over the sound of the twelve albums I've sold. All them pennies going clink clink everywhere.
For the crashing thing. I think it started with 1304 or around. It's not related to the song itself im pretty sure as it can even happen on an empty project. To me it feels like the software can't keep up with rapid input. I work incredibly fast and key shortcuts are second nature by now so sometimes I can go play-stop-play-edit-play-stop-save-enter-enter-left-enter in two seconds. Seems like the software just tries to initiate a new routine that's dependent on another, before that other finishes. Does that make any sense?
For the backup. I think Cubase does it perfectly. There's no distinction between save and overwrite. When you save your file, it creates two files. The .CPR project file, and a BAK backup with it. The reason is that if somehow, for whatever reason, your .CPR file gets corrupted, there's a copy of it available. If there's already a .BAK file in the folder, it creates another one with "-02" appended to the file name. Then 03, 04 and so forth. Yes it clutters your folder but your data is safe. When your project is finished, you can simply remove the backup files.