I regularly need to apply patches written months/years ago to a branch that's changed many many times (maybe a thousand) - for example, patch written at a speci

I regularly need to apply patches written months/years ago to a branch that's changed many many times (maybe a thousand) - for example, patch written at a specific point in time spends 2 months being reviewed, and by that time it no longer cleanly applies to trunk. Rebase may let me replay all of the other changes on top and save me lots of manual effort to get the patch so that it applies cleanly to trunk