I've been eating approximately an (Haas) avocado a day for almost three years. Generally, all the avocados for sale in one place at one time have similar ripen

I've been eating approximately an (Haas) avocado a day for almost three years. Generally, all the avocados for sale in one place at one time have similar ripeness because they came from the same shipment which means they were packed at the same time from trees in the same orchard. Significant variation in ripeness is between crates not among them. Last weeks shipment are all softer. Today's new arrivals are each harder. The only reliable visual cue is that very very ripe avocados are cratered. you want them to be ripe and delicious when you buy them I think most people want them ripe and delicious when they are eaten. Or at least I do. I deal with unripe avocados by siting them in a fruit bowl until they're ready to eat.