We won't know how "close" we are until an actual cure is discovered that can be safely used on a large population. Some of these technologies have been dead ends, for now. Like 4-5 people have been cured EVER but they were on their deathbeds and basically all their bone marrow was destroyed and replaced to cure a different disease and the chance of death from the procedure was very high. Curing HIV was just a happy accident in their cases.