do cheat codes break the game?
Does heavy amount of cheats used for the following purposes
Hybrid creation
Skills
Traits
Make happy
And a restaurant (move objects)
make the game unstable and lagging?
My sims started going all jittery, in fact all animations turned jittery and I wasn't able to split households anymore either. I also use MCCC, but I doubt it was causing all this problem.
System: I have a MacBook Air 2020. I'm sharing the system details just in case it's relevant to the problem that I'm facing.
PS: I just created one base hybrid and copied it over 4-5 times to create sufficient hybrids that I needed for my story.
I have hybrids, because they kept getting born naturally and I got tired of cheating one occult type off of them. (I have a spellcaster who's married to a family-oriented mermaid and they love children, okay?)
In my "just a player, don't work for EA, hybrids are unsupported" opinion, hybrids don't break your save file. The most common issue is that mermaid hybrids start walking around on their tails and swimming through the floor. If you have Iced Cream's Hybrid Stabilizer (available on modthesims, as mentioned below), this doesn't happen. Other potential issues include that the spellcaster charge UI isn't visible with vampire/spellcaster hybrids without the mod and therefore they're more likely to die of spellcaster overload because you can't see that they're getting overcharged until they start sparking. Again, not supported, don't work for EA, play hybrids at your own risk.
(The trait thing is 100% true; I replaced the Kleptomaniac trait on a Sim and she was perpetually tense from not stealing anyway.)
Sadly, in my experience, I would suspect your restaurant and home. I recently ran a bunch of career rewards/personal inventory stuff through the recycler and my laggy, awful frame rate save improved a lot.