Yes she will be sadly missed, what a great singer and group. My wife and I had the good fortune to see the Seekers at the Sage Gateshead here in north east, England a few years back. It was a fantastic show and so enjoyable, we did hope they would be back in the northeast again but sadly this won’t happen now, RIP Judith.
Some women have unique voices in that as soon as you hear them you know who's singing. Karen Carpenter springs to mind, and Judith is certainly up there with her and a few others on a short but exalted list.
Interesting you mention Karen Carpenter, like her Judith started out on piano here’s an interview from a few years ago youtu.be/MybGxV0ngd4 I had a brush with Bruce Woodley once leaving Deluxe guitars South Melbourne Matthew