stiff prairie
Once you get so far into the game, menus become difficult to navigate due to the amount of items that become available. This is most observable in the pickaxe collection and gear crafting menus. At first this was less of an issue because everything was sorted by biome, but after years of new biomes and pps items being added the menus are now a jumbled mess. This especially becomes a problem when you've rushed plenty of prestiges and now your menu is full of items that have to be bought plenty of times before actually going away.
I suggest a collapsible menu system similar to the one that the furnace uses, which I've provided a mock-up of. Each section would theoretically be split as: A section for armor and tools, one for each biome, one for the mythical machines, one for seasonal event items, and one for the special runic abilities. Since these menus are constantly used, I'm sure players would appreciate the clean-up.
cedar skiff
lavish forum
nova tusk
lavish gulch