Sometimes we get bored.
Blackberries may connote a failing business model but raspberries conjures disrespect and examples of the worst in things.
But they are both delicious! I give the edge in taste to blackberries due to the tartness (the “pit” is part of it’s pleasure), but it always seems a more special treat when raspberries are around to consume, perhaps because I encounter them less frequently.
Consider the pomegranate for a moment: that’s one BIG pit that you really have to work at to get to the berries!