> The sooner you replace delta with omicron in a country, should this continue to hold up, the better.

You think you want that, but this also increases the chances of Omicron evolving into something worse, like picking up genetic fragments from a haemorrhagic virus, or being able to cross the blood-brain barrier.

The 2nd wave of the Spanish flu was deadlier than the first: being infected by an earlier variant doesn't automatically make one immune from subsequent variants, especially when given maximum genetic resources and time to work with by letting it run rampant. The ideal scenario would be making COVID extinct ASAP.