Length of mitochondrial (female) lines

Is there a way to find the longest unbroken chain of females in the tree and ideally a list of such chains sorted by length?

I know there is a quick view option called “Mother lineage” which does the job of giving you the length of your direct maternal lineage but checking it for every single person in the tree to find the longest chains is impossible.

Not impossible, just time consuming.

Well, it depends on the size of your tree - if it is large enough it might be prohibitively time consuming which is why a tool to automate it would be very neat.

This could be done as a report, but it would take some time to generate depending on your tree size.

I added a feature request for a new text report and also one for the yDNA counterpart:
https://gramps-project.org/bugs/view.php?id=12331