I will also +1 this as an i3wm user. I do use displayplacer and yabai together though. I have two identical external monitors that don't behave well with MacOS. Apparently the monitor's unique id's are not unique in MacOS. This causes MacOS to get them mixed up any time I disconnect from them. I have a keyboard shortcut that uses displayplacer to toggle between the two monitor valid configurations.
This person [0] also had that issue, they found that for their monitors for whatever reason, using the contextual screen IDs instead of the persistent ones always results in a consistent configuration. Might be worth a shot.
