I spam the key. But that is such an extremely rare case that it’s worth the trade-off. The firmware also does allow you to add a key to toggle auto shifting on and off, so I could just add that if I want, but I don’t see the need.

If I need to repeat a character many times in a text editor, I’d just use the features of the editor to do so. Helix or Neovim has you covered for repeating characters thousands of times and copying it to the clipboard with a handful of keystrokes if you wish. But what an edge case though.

For double letters, I just double tap like you would normally when typing. 👍