As part of #5676 we would also like to compile a list of principles tied to data.table. This will be incorporated into other material over the next few months but wanted to see what you all thought about the list we have initially put together.

• Few (if any) dependencies
• Time & memory efficiency
• Concise syntax (minimal redundancy in code)
• Few breaking changes
• Backward compatibility (certain time period of support, e.g., R version from 5 years ago?)
• Comprehensive and accessible documentation
• Clear error and warning messages

Anything you'd add to this list? Anything you'd argue does not belong on the list?

Thanks!