You can have more than that into some of the mechanicals. It's a very strange rabbit hole to go down. You have a world of different key layouts, number of keys, spacings, key profiles, custom keycaps, a pile of different switch types, things to modify the feel of the switches, even after you've picked the type. There are whole marketplaces for these things, new lingos to learn, etc. People with actual collections of boards, ones they use for specific things, and even meetups for them.