Nothing.
My wife and I are both 70 and retired.
We downsized our cars from Acura and Honda Accord EX to the Civic 2003 we now share.
We are very happy. The Civic has plenty of pep (thanks to the VTEC, I am sure), it is reasonably comfortable (ample space inside fore and aft, and in the trunk), and the high mileage is a God-send these days.
The a/c and the sound system are the only areas where we have had to compromise a bit, but no big deal.
Oh wow, the gas mileage is AWESOME!! I do all city driving and get about 29 mpg!! Nice little 13 gallon tank.