For example, I have a split for house work and car bills, with a couple of different categories commonly used. When my partner pays me back it would save the faff of amending the payment category. It could default to last category of payment I added at the least, with added functionality for those with Monzo perks maybe.
I think this is even more relevant for one-time splits, as there is less scope for spending to be split across several categories, so surely it’s possible to recognise the category correctly?