How to play two save games at once? (Especially appreciated from youtubers that have multiple LPs)

Once you create a new save everything you do is independent of any of your other saves. To play a different save just select ‘load game’ on the main menu which will bring up a UI box displaying all of your saves. Saves that were created before the new save management UI was added will not have a preview picture of the household until you play it, but any game that you have saved recently will display the last played household in the preview window.