On MacOS, I just have a single key associated with my top apps.

cmd + shift + {key} takes me right there

J = Chrome K = Terminal H = 1Password ... etc

Hammerspoon setup: https://github.com/joeyagreco/dotfiles/blob/aab6c4631c4c6b09...

Global maps: https://github.com/joeyagreco/dotfiles/blob/aab6c4631c4c6b09...

(local maps are not version controlled for obvious reasons)