My daughter just asked me to put new batting in her Christmas quilt that I made for her 20 years ago. it was just a patchwork quilt and it was tied, not quilted. There were 2 patches that needed to be removed and replaced, which was not a problem. The problem was the back did not fit any more and I thought it was easier to just put on a new back than retro fit the other, and I am quilting it, instead of tying it. My daughter feels it is not the same but likes it just the same and very happy that I have done it for her.
Back in 1978 I made an embroidered baby quilt for a friend. I was told this summer, it has been re-done with new batting and backing for the three children of the baby I made it for. My friend said each baby has used it - the blocks were the iron-on nursery rhymes, she has turned it into a family tradition.
Is it worth it? Only you can say for sure.