I confess that we've put quite a dent in it. Luckily I made it a bit smaller (a short 8-inch). In the US, I used to sometimes make a carrot cake loaf, similar to how people make banana breads. That can work well for small households, giving you the same taste, but without as much "Wow!" appearance as a full cake. You could consider that and then freeze parts of it. It freezes very well, with or without an icing.