Is there a drawback to switching active households frequently?

I'm glad I decided to read this thread. I didn't realize that items in inactive sims' inventories would be a problem. Maybe that's why my current sim's game in IP got so laggy after only 9 sim weeks, even with all of the routing issues fixed. I was getting almost no stuck sim notices, yet the lag had become so bad I couldn't stand playing that save anymore. So I moved her to her permanent homeworld sooner than I'd planned. In the future, I'll plan to do regular purging of inactive sims' inventories.