Comment by egypturnash

I am pretty sure the sign should read "you have to be at least this much of a nerd to buy this keyboard" :)

Or maybe "you must be at least this far down the rabbit hole".

If you're a total keyboard nerd then you will have formed Opinions on which switches you like based on the sound they make and the feeling when you hit them. Follow a keyboard nerd community like /r/mechanicalkeyboards or /r/keebgirlies and you will see people constantly posting videos of them typing on their new keyboards to show off its "creamy thock" sound. There's like a few dozen different switches out there and some keyboard nerd shops will sell you a little block of a bunch of different switches with keys on them solely for you to poke them a lot and decide what you like. Or you could just take the default option.

If you're a total keyboard nerd then you'll have a copy of the QMK source set up so you can make edits and shoot it to your keyboard with one keypress. Or an even more esoteric open-source keyboard firmware package because you have Opinions about that too.

Picking keycaps is easy: what color do you want them to be? Do you want a few extra keycaps in a contrasting color to mark the home row, WASD, various shift keys? Keys with astrological symbols, abstract designs, or cartoon characters instead of letters? If you're a total keyboard nerd you are probably fine with keycaps with no letters on them because you have a complex setup with a lot of layers. Maybe you want to go even deeper down the rabbit hole and buy a transparent acrylic key with a little sculpture in it. Maybe you care about the shape of the keys, too. There's a bunch of different possible profiles for the tops of keys, because that contributes to the feel too and some people like to have Opinions about this.

It's a really deep rabbit hole!