Things to add to the sims online disscussion
Thousands out of 5 million is not a lot of people to lose. Even 50 thousand or 100 thousand out of 5 million isn't that large of a group. Even look at the laundry vote, I'm sure thousands wanted other options than laundry fact is majority wins in marketing because it makes the most $$.
The love of online games and socializing is not new to this generation, Facebook and twitter are pre 2010s meaning people who are in their 40s and 30s helped make them popular not the people who are 20 and under or upcoming (not that I think 30 or 40 is old, they just have been buying and contributing to the sims game before so their vote was already accounted for theoretically). various online games have been popular since the early 2000s (from MMos like WoW (2004) ultima online (1997) final fantasy and all sorts of first person shooters) again, not the newer generation.
In 2013 sims city flopped spectacularly when online, which isn't that long ago
Other life simulators online while known are not as popular as the sims series even to this day.
Other online sims games have not done well
It is important to consider if the game is targeted at 11 to 15 year olds what parents will think of an online games (some are worried about that kind of stuff).
Not only would CC and mods be a pain online, what about if some people have expansions others don't? (which often have new interaction of life states that can impact other sims)
Aren't the sims mobile and the sims free play online, wouldn't those count as side games online to play for those interested? (genuine question I have never played and don't know anything except they exist.
As a side game most of these can be ignored and most people probably wouldn't care
Just some other things to think on