Updated March 30, 2023, by Jouanna Bondakji: The Sims 4 is still having different packs made that add depth and realism to your experience, though many players argue that a lot of the things in them should've already been in the base game.
Some of these are just for cosmetic purposes, some add silly fun, and some make your game even more realistic. Luckily, the Sims community is full of talented people who create custom hairstyles, clothing, furniture, and even gameplay tweaks.
Related: The Sims 4 Mods You Didn't Know You Needed Until Now