My experience is that the entire system acts as if every second of the court's time is priceless and the juror's time is worthless.
I turned up, registered my presence, and then sat reading a book for hours before I was called. I heard one case that ran for a week, then another one that was such a weak case we reached a unanimous verdict within less than 10 minutes. The second case I heard was with most of the same jurors from the first case, with a couple of people swapped out. The new people had sat for most of two weeks, expected to turn up every day but not actually used for most of the two weeks they were expected to serve.
It's easy to see why people don't want to do jury duty, especially if an employer isn't required to pay them and what the courts offer is a lame substitute for a regular wage. You can hardly blame people on a tightly balanced budget to be reluctant to end up taking a heavy loss for doing jury duty.
I was also alarmed at the notion that hearing a court case may expose jurors to distressing material, but that the court basically washed its hands of you once you were done. Their advice was that if you found the court case distressing you should seek counselling. That's it. No support, no care, nothing.
I found the process interesting, but don't know that I'd rush to volunteer for it.