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That makes more sense then that it didn't take very long.  You've helped us a lot confirming that we can buy the base game for Origin and start playing it through there.  We'd nearly given up on trying to find for sure whether that'd work since we read so many different answers on that question.  

We picked up the base game fairly cheap with an expansion bundled with it so we have it in Origin now, and like you said all the packs we have popped up in Origin too without us having to buy them again.   In fact the Origin app detected our Sims4 install too so we didn't have to re-download anything, then it automatically verified the files, must've found problems, repaired them, and now our menu options are displaying fine and we can see the scenarios.   So thank you very much for letting us know those packs would transfer over once we had the base game purchased in Origin.