For myself,I use two stage. I shoot one round at a time.
Many years ago,I tended to have several pieces of brass in the air at the same time. (5.56 was < 3 cents a round). Lacking as much reset,the single stage could be fired faster. You can pick up the rhythm of the bolt slamming into battery ,make a lot of dust and noise and make an empty magazine better with a single stage.
Priorities.
Now I like expensive barrels,small groups,or seeing my target react. Hits.Three match grade handloads cost a buck.
Two stage is fine . Geisselle ,Jewell,even Rock River NM. I'm sure there are more I have not tried.