It's been a while since I've looked at the function signatures of the 4.1 AddPlottable methods (AddScatter, AddSignal, etc). They should all be reviewed to ensure consistency and simplicity.

Once the signatures are reviewed and all look good, they can be added to 4.0 and the cookbook documentation can be updated to use them. This allows new ScottPlot 4.0 users to learn the new API by default, and will make it easier to upgrade to 4.1 later.

• Review non-Add API (link)
• Review Add API (link)
• Add API fields to cookbook
• Tactically add the most common methods to 4.0 (non-breaking / no warnings)
• Update the 4.0 cookbook to use the new methods

EDIT: 4.1 is close to ready to release, so no need to back-port the API to 4.0