The game I mod for got updated recently, and it significantly slows down the run. Without implementing a new category for old patch vs new patch (as the game felt unfinished before) is there a way to obsolete the runs from the previous patch so the current patch runs can display at the top?

Two options I can think of:

Make variables for the different versions, mark the new version as default

Make a new category, change the old category to misc. "legacy"

I would do a subcategory, that's what most games do.