Consistent (Not Consecutive) Donors Options in 2022?

@Bobby Steurer
This isn't a solution since Blackbaud lacks the tools to do it automatically, but I may be able to give a more efficient process (if this allows you to use less steps, that should translate to shorter wait/load times).

For using the Summary Information field, I'd break down the 50 years into sections:

Total Number of Gifts given > 5 | Gift Date between 1-1-2010 and 1-1-2020
Total Number of Gifts given > 5 | Gift Date between 1-1-2000 and 1-1-2010
etc.
Obviously you can use whatever numbers you like. It depends on what you define as a “Consistent” donor.

I'd avoid using something like
Total Number of Gifts given > 5 | Gift Date between 1-1-1970 and 1-1-2020
Since this can also grab someone who has given 5+ gifts between 2019-2020. I assume you want to see people who have been giving over the past 50 years, just not consecutively.

Then just output the Constituent ID + Gift Date + Whatever else you want/need
Export to excel

In Excel, format your dataset into a table
Make a new column with the function =YEAR(B2) [B = Gift Date Column]
Go to Data → Remove Duplicates
Select the ID column and the new column you made with the function

This will remove all duplicate IDs based on the ID and Years, you should be left with each individual person with every unique year they've given.

Make a new column with the function =COUNTIF(A:A, A2) [A = ID Column]

This will give you the number of times that a person appears in your table. Since we've left them with every unique year, the resulting number of this function will give you the total number of years that they've given within that 50 year span.