Help with filtering table and using that table as context

I realize that my subject is a bit vague so let me start with a practical example.  I have the following data:

and I want to generate a new column which provides for me a running total of dates that appear after 10/9/2025.  So the resulting column would look like:

The idea is that we essentially get a "burndown" of rows that have dates appearing after a specific point in time and I can generate a nice visual based on that.  I have created a simple DAX query to generate the table above:

New Score Applied Date = 
var cur = SELECTEDVALUE('table'[Changed Date])
var calc = CALCULATE(COUNTROWS(ALL('table')), CALCULATE(COUNTROWS('table'), FILTER(ALL('table'), 'table'[Changed Date] <= cur && 'table'[Changed Date] >= DATE(2025, 10, 9)))
return calc

Which works great when the table is a direct query.  However, I've changed the table to add a new column:

This new column records whether or not the entry is the most up-to-date version of the data.  This means I have to first filter out the values which are 'False' and then I can start counting dates like the above.

Despite my best efforts, I have not been able to create a reasonable query to make this happen.  I've tirelessly searched for queries where I can make a slicer work with a calculated table like the following:

New Table = 
var sel = SELECTEDVALUE('table'[Date], DATE(2025, 1, 1))
var curr = CALCULATETABLE('table', FILTER('table', 'table'[Is Current]))
var calc = COUNTROWS(curr) - CALCULATE(COUNTROWS(curr), FILTER(curr, 'table'[Changed Date] <= sel && 'table'[Changed Date] >= DATE(2025, 10, 9)))
return ADDCOLUMNS(curr, "new", calc)

 But this does not work, as I've found, because slicers are fundamentally incompatible with calculated tables/measures.  It's not exactly clear to me how I can both filter out the 'False' values while also counting rows on that resulted set to compute the running date totals.