[13:18:20] <Joaolvcm[m]> hi, i've switched from a normal mongodb to mongodb atlas, and it has 3 replicas, with a primary that is mostly the only that is in use, and there are other 2 secundaries that are mostly stable.. is the only advantage of this avoiding downtime? and they switch the primary from time to time, what is the advantage in switching if all of them are up?