lets take a look at these though because its interesting.
The swords werent used because they werent as powerful as the fully reforged caledfwlch.
The hammers were no longer used because they werent as strong as the hammer of zillyhoo.
The brainfork we just dont see but feferi might still have it in her inventory when she died.
Sollux has stayed out of fights for the most part. the only fight hes had since the black king was against eridan who was firing science at him. science that his psiionic blast could counter like in dbz so his throwing stars would be useless.
Rose uses the quils of echidna so it might be that the weapons of game legend might be stronger than the weapons of cherub legend which would also be why jane uses the red skaia fork which draws power from skaia and was created by condesce.

Tavros has snowmans lance somehow which is stronger than the fiduspear and has better reach than the daggerlance.
So that leaves the daggerbane ragripper and the spearcane. Why did terezi and kanaya go back to using their old weapons? to be honest? probably aesthetic. it would be 100% in character for them to ditch stronger weapons for ones that fit their aesthetic more.