I had to give up Sims 4 in 2020 due to size of updates and I'm on Hughes Net internet and have to do most my use in middle of the night. Well sometime in next couple months will be getting High Speed Internet. So I want to get back into Sims4. My main question is how much of my cc will be broken? I know my mods are outdated as nearly every update broke them. Will CAS stuff be safer? How about objects? Created a lot of lots and Sims and worried may not work just curious.

If you're starting all over, the EA app will auto-update your game during re-install. You're right about most mods. As far as CC goes, most basic CC such as clothes and hair, stands the test of time and no update is required. Certain other CC, such as objects, may require updating - especially things like doors and windows. Usually you won't know until you play the game.