Dynalist has a feature in the works called history revision
It pretty much solves the issue of version control of things you do before automated daily backups hit
2 zip files are made per day from dynalist automated importer, but you could always dump those later in another folder down the road
Personally I like the way dynalist backup is right now. Its straight forward for me to recover data since its all very well organized.
Also, my 290mB size on all my backups is over an 8-9month period, and I duplicated docs multiple times so in reality my file size should be around ~100 mB or less right now
You'll be really hard pressed to hit 200 mB file size backup in a year though. That's just pure text almost as well.
In 5 years that would be 1 GB tops, which is still very small for backup sizes
backups are only in text and OPML format (images are stored on dynalist's server)