Hot-swappable

A hot-swappable keyboard uses sockets built into the printed circuit board instead of soldering each switch directly in place. This means switches can be pulled out with a simple switch puller and replaced with a different type in minutes, without a soldering iron, solder, or any electronics experience.

This matters most to people who are unsure which switch feel they want, since it turns switch choice into a reversible decision rather than a permanent one made at build time. It also makes repairs simple, since a single failed switch can be swapped out on its own instead of requiring the whole board to be reworked.

When buying a hot-swap board, check which socket type it uses and whether it supports both 3-pin and 5-pin switches, since some sockets only accept one or the other without filing switch pins. A common mistake is forcing a switch in at an angle, which can bend or snap the thin metal socket contacts and effectively turn a hot-swap socket into a soldered one by accident.