I'm not burned out of The Sims 3 personally. Not to mention I do not own all worlds and store content yet, still ahaha So I haven't played with a lot of things yet.... and my freaggin' laptop from 2014 can somehow run TS3 max settings pretty well....albeit while plugged to the electricity, but better than my desktop for some weird reason (since it has better hardware) ahaha So I'm enjoying it a lot.
Of TS4, yes, very much so. I don't even care about the new packs, they are shallow with very little gameplay.