Where have all the new variants gone?

In the early days of COVID, it seemed like we were getting new variants of concern every few months.Wuhan led to Alpha then to Delta via a side trip to Beta for parts of the world.But ever since Omicron came in like a wrecking ball at the end of 2021... sure there has been a lot of new sub-variants, but no new challenger to take on the Big Boss.So could Omicron be the final variant? Are things starting to settle down? Will saying this mean a new variant is around the corner?All the big questions on this week's Coroncast.