design mom said:
However, that was 4 years ago... and I haven't been called since.
My mother got called for jury duty for the first time when she was 56. That day, while she was in court (and this was before Massachusetts went to "one day/one trial"), my dad had a heart attack. She called the courthouse the next morning and was told the same thing as you, that she was excused for now but expect to be called again shortly. Nope. Nothing. She never got called for jury duty again.
My dad, on the other hand, after he retired, got chosen for a trial. I forget the actual case, but it was a civil suit. I remember him being disappointed when, after a trip to 'the site' and three days of testimony, the two sides settled and the jury never got to deliberate.
I've gotten three notices. The first time, they didn't need me at all (the infamous "call us the day before"). Second time, back in the nineties, district court in the next city over. We went, we waited, we waited, we went to lunch, we waited, we went home - no trials. Done for (at least) three years. The other time was two or three years ago, probably two. District court again, this time in a city I'm not comfortable visiting without my doors locked. So I called the number on the card and explained my concern, and the woman told me what to write to get my assignment changed - something about 'extreme fear'. I did, and got
reassigned to the courthouse around the corner from where I live.
We went, checked in, watched a video, the judge came down and talked to us - and then because he had other business to take care of, sent us on a 'break' for an hour and a half! I was too smart to go home, though, even though I could see my building from the back of the courthouse. I know me, I'd fall asleep

Anyway, we reassembled, went up to the courtroom - and the one trial? The one we might have been assigned to? Nope. No trial. The defendant chose to let the judge decide? I forget.