I happily use a github repo for taking my 'programmer notes'. Advantages:
1. Goes well with my programming workflow: Change/Commit/Push
2. Allows me to use my preferred editor
3. No need to worry about backups: Git push and you're done
4. Accessible from anywhere, even if you don't have your computer
Is there anything that Quiver would offer that I wouldnt already have with a github repo?