The system is barely sufficient if you had a crash. Then you know to grab a backup before opening the game again, and hope the .olds will save you from total corruption and loss.
It would be nice to have an option to keep more, but the files are gigantic. I like my home-brew system, which compresses them off onto my non SSD drive. I dunno ... I am with you that it could be better, but for stuff like this, it seems like DIY gets you what you want exactly rather than deal with 'meh' that cuts across the average.