Do you age up your babies or let them age naturally?

My sims are babies a long time, I use really long age settings, thanks to MC Command, which also lets me tweak the default needs of babies in game globally, so they are by default less needy. The Show Sims Info mod lets me see the age of any sim as well, so I know when they are ready to age up, if I don't want to wait on the game to autonomously do it.