I do have pretty much about 1500 sims in one save all using some CC of some sort so yeah that is probably the case with this LOL.
I do have other programmes running as well, I play the game through Steam, thats running the background as well as the EA App, Discord to chat with friends etc and Chrome running Twitch so I can watch streams on the other monitor, so they could all be factors.
At least I know I'm not the only one experiencing it, I do enjoy the game alot and I like to populate my saves with alot of sims whether they are played households or not, I'm quite addicted to CAS and I love making different and unique sims alot.
I guess it's something I'll probably have to put up with because of this play style, I might do a new save game with minimal sims next time and see how that runs 🙂
Another option to try @andypuk1980a might be letting the game manage the relationship culling. There's a good chance that's what's limiting the Live-mode loading image loading, from your description of what you've done already. With 1500 Sims, you'll end up with a lot of Sims losing *all* relationships, though.
