Quite often. While I'm focusing on raising my characters,  materials in my inventory are consistently getting used. To compensate for the higher rarity materials, I craft them using lower rarity materials and level up my characters, weapons, and talents. I make sure to prepare a few extra if I have to level up some characters' skills, and they use the same material as the previous one. Another reason I visit the crafting table is condensed resin. A lot of time, I miss using the original resin or don't have time to play. Then, I just visit the crafting table to create some condensed resin, so I don't waste any.