I've used Kailh MX hotswap sockets in my keyboard designs for a while; I really value the flexibility of being able to swap out my switches. However, since my keyboard designs are not flat, I can't just use a standard full-size PCB for my keyboard. This allows me to have individual PCBs for each switch for better support, and makes it easier to solder to them instead of having to solder leads to the hotswap sockets directly.

This was directly inspired by my work on the Dactyl Lynx keyboard: https://hackaday.io/project/176016-dactyl-lynx