Technically, I don't need another board. Small or not, there are times these are handy outside of quilting: masks, cuffs, plackets...small jobs you mend or need to touch up to go on.
I have several boards and iron items, and more then most of you. Not a humble brag, it is what it is. Some stand alone, some work on other surfaces.
I have 3 full size fold away boards
One professional board
Leg Board
Velvet board
2 sleeve boards
Sleeve Cap board
3 busks
Tailor point
2 clappers
In wall board
Rolling hamper style board
Drapery board (it goes over my pro board)
And a bunch more. Sometimes...things like this are just easier to pull out or use because of convenience, even if my iron is as big as it is.