Add the ability to create an Attribute Rule in ArcGIS Pro that is equivilent to the "Last Value" method that was available in the Attribute Assistance Add-In in ArcMap.
Example: if digitizing many features from a plan set, it saves time to have certain fields like "Install Date", "Location Source", "Plan Set Number", etc. be automatically populated with the last value you entered in an edit session. Once you switch to a new plan set, you enter the new values, and the Last Value is updated to the new value and populates going forward.
This is different from setting default attributes in the Create Feature Template, although editing your default attributes in the feature template is the way to achieve this, currently. However, this can be cumbersome if you have A LOT of different templates for different feature types, subtypes, sizes, etc.
*Bonus points if we can click easily review, clear and/or update the value stored in the Last Value variable, like we could when using the Attribute Assistant toolbar.
This may not need to be an Attribute Rule, if something more equivilent could be achieved by adding functionality to the Create Feature Template properties, like being able to enter a variable instead of a value (i.e.: %LastValue%).