Bulk and packability

A largish treble hook in a psk that is jamb-packed with stuff will snag on everything when you unpack your kit. It willtake up a much larger volume than a flat gaff hook. If you try to haul in the fish with the treble hook or to grapple with it you will - potentially snag and tangle other things - including yourself. Treble hooks are wonderful for fishing with but don't pack well.

Just my $.02