Given that most careers are at home or have you staring at your empty home for a while in the Sims 4, I found that something I missed was the variety of things going on at home that was present in the Sims 3. I played many Sims 3 games working from home, but they were never boring. The plethora of magical gnomes, which did some pretty interesting things (Bucktooth Butternut, Sgnomeman Bittertrotter, Abracadabra, Evil Mr. Gnome, Gnome of the Darned, the Troglodyte gnome posing in front of technology with his club raised), people passing by or peeping in my windows (from vicious gossip to hearing the chime that someone got a crush on my sim and wanted to get to know them better,) zombies (kicking the gnomes,) wild animals, and aliens ringing the doorbell in the middle of the night all gave some activity, and even opportunities to socialize (you know, when you put the bowl of cat food down beside the garbage can so you can pet the racoon.) I seldom have my sims watch tv, but I almost always put a tv down for the gnomes. There really was a lot going on (even weather wise), more if you did things like garden or plant herbs, which gave you even more ways to interact with the environment. And unless you didn't bother to talk to even one person, the sim would regularly be invited to parties - no loading screen required.
And while there were many careers from home in the Sims 3, as there are some in the Sims 4, in the Sims 3 you could choose if you sold a painting off the easel, or sold your gardening, etc, through your inventory, or head out to the consignment store, sell them at the grocery store, etc. You could even use the rugs if you wanted to. There was the choice to get out and do more than look at the four walls all the time, even for careers that were from home. So, instead of selling the the next painting at home and starting all over again as in the Sims 4, you had the chance to make a little extra money by putting in a little extra effort by using the consignment store. You could build a reputation at the store, build a relationship with the employee (who holds your financial well being in their hands,) meet other sims there, irresponsibly go drop your first consignment payday for your less than masterful paintings on a tattoo on the way home and not make your 22 simoleons bills that week and have the repo man take your alarm system so you get robbed later in the week (keep the good stuff at the back of the house.)
So, home life in the Sims 3 could be a flurry of activity, even if you lived alone. You could welcome it and even place objects to enhance it, or shake your fist at it and kick and sell the gnomes, shutter the windows, build a big fence, and put up a privacy gate. There were also opportunities to bring your at home careers out into the world to make extra cash, socialize, and do things - or not. You could be a total and complete shut if if you wanted, or get out there, and it gave some variety to the game play, along with traits (some traits have a sim like to stay home and not be around people and be very uncomfortable in a crowded place or meeting someone new, while others will have your sim soak up the sunshine on the commute and adore socializing while quickly tiring of being alone at home. These factors alone can totally change what it's like to have your sim crawl out the door after staying up several nights painting for a trip to the consignment store. Whether it's liberating or anxiety laden for this sim to take the extra step out into public to sell their wares vs be in the comfort of their home in their element. Introverts and extroverts.) When I play the Sims 4, it's paint, sell, paint sell. No reason to move until the sim needs their motives filled, which is pretty repetitive. I think a more interesting home life is something that could have been present more in the Sims 4, even without needing to go out to do something (and sit through a loading screen.) For me, the home life is pretty uneventful unless people come over and leave glasses of water lying around all over the place for me to clean up, which makes me kind of mad at all my friends so I wish they would stop coming over.