Just don’t expect them to go up against escaped orangutans armed with throwing stars, as was the original plan for Anchorman.
So from that perspective, it would actually make a lot of sense to wait on making Anchorman 3 and let the actors age further.
Anchorman 2 only took place six years after its predecessor, whereas if McKay and Will Ferrell were to tackle one of the those two concepts, it would necessitate at least a two-decade jump.
One that we could count on, at least, from a third movie in this series, is the absurdity of these characters and the hilarious situations they find themselves in.