I know for fact that plots require,among other things,a certain minimum Happiness value in order to upgrade. Assuming that every other need is met,except for Happiness,is it possible for me to tip the Happiness over the threshold by donating booze and chems for the temporary Happiness boost they provide,and make it stick for long enough to effect upgrades? Or is Sim Settlements aware of the Chemical Bliss idea,and smother it in the crib for the application of plot upgrades?