[just6979]

If you rebase form main often, it keeps the difference to main quite small, so that when it comes time to do the final merge to main, it's either able to be fast-forwarded (keep it linear, good job!), or at least a very low risk of being conflicted (some people like merge commits, but at least your incoming branch will be linear). Because even though you might have commits that are a year old, initially branched from main from a year ago, their "base" has gradually become whatever main is _now_.

It's just like doing merges _from_ main during the lifetime of the branch. If you don't do any, you'll likely have lots of conflicts on the final merge. If you do it a lot, the final merge will go smooth, but your history will be pretzels all the way down.

In other words, frequent rebasing from main moves any conflicts from the future to "right now", but keeps the history nice and linear, on both sides!