I agree this will be very helpful. Could be as easy as having the Save button allow you to apply to whichever plan(s) you want.

Income, expenses, and assets should be factored out of plans in the same way accounts are since I would assume most plans are based on currently existing state that would be consistent across plans.

However, I understand the need to model something like a change in employment, downgrading a home, etc. In that case, layering on plan-specific changes in these categories would make sense.

There is currently the option to duplicate an addition to a plan such as an expense, income, etc. This adds a new item to each plan. I would like to see a similar feature that doesn’t duplicate but rather modifies existing values across all selected plans.