What did the sims 4 do better than previous games ?

I would say the calendar, the group system, all other perks systems (vampires, spell casters, celebrities) & parenthood for the character values.

The calendar is definitely the best and being able too decide on holidays and events etc, definitely vampires, witches and celebrities are better than ever, I think create a sim, hairstyles, clothes and how sims look, the sims 4 won this one too

There are many that I can think of, but I'll just stick to my favorite. I like the Sims themselves in TS4 better than the Sims in TS2 and TS3. I haven't played TS1.

The sims in the sims 4 are definitely easier to look after, its takes a long time for sims too die because of their needs the sims in previous died too easily, multi tasking, I like that my sim can drink, eat and talk at the same time, This is my personal opinion but i love the fact we cant control cats and dogs, this time around, I like that they have a mind of their own like real life and you have to figure out what's wrong with them, I also love that we have a vet and it can also be your sims career

aliens because you can make them in cas

I love aliens in the sims 4, I also like that being abducted is harder to happen because when it happens your omg yes ?

Holidays, Vampires and TODDLERS!
I really like how they gave toddlers and children their own skill sets.

Holidays and vampires are better than ever, Toddlers are funny full of chaos, they are cute and brilliant ?, I like that from teens too elders they have the same clothing and hair options, I found in the previous games that teen and elders didn't get alot of clothes, theirs plenty of jumpers, tops, plain jeans& trousers, long shorts and skirts for elders too wear

CAS tool is amazing. Clothes stretches so pregnant sims can wear whathever they want and they are not restricted to ugly pregnancy fashion. Teens are the same height as adults so they have plenty of clothing options!

I am a fan of not open world. Unpopular opinion, I know. I love how when you visit a park for example the whole place is crowded. In TS3 I didn't have this. My sim went to a bar and they were the only visitor.

The search tool in B&B mode is freaking amazing. I can't even describe it by words. And building is super easy. The drag system! Just great!
Tho whole Get Together pack is awesome. I love clubs so much. It is a must for me. I couldn't play without it anymore.
Discover University. Also a great pack with the most beautiful town and absolutely gorgeous CAS. I loved University in TS3 but this is a whole new level.
Spa Day. I love yoga, I love meditating, I love the incese stick, I love B&B. I love everything about it.
Movie Night. I love everything about it as well. I love the art style. It is colorfull and simply flawless.

I love that our sims can be whatever gender they want. Or no gender at all. I very much appreciate that.
It is also amazing that men can take paternity leave! And that sims can take many of them and that they can have PTO. Seriously. In my country the maternity leave is 6-8 weeks and then you take 2-4 years off and it is called (lit.) parenthood vacation. Funny. This all is paid! We are also guaranteed to have at least 20 days of paid vacation per year. I know this all is not standard in other countries so I am happy that we have such options in this game.

Toddlers. I think I don't have to add anything.

Thanks, The Sims team. I appreciate you one and all! <3

I prefer the sims 4 university too the rest, I like that you're sims arent just stuck in the university world, your sims can live anywhere and be at uni, it makes this expansion much more replayable, I think the customized gender options are great, it let's every player express themselves, After all the world isnt black and white, its colourful and I love it that way, would be boring if everyone was exactly the same, everyone is the same but different, Get together is one of my favourites and parenthood is a solid pack