It wouldn't be a surprise.
With their being so associated with the 90s/00s, I often forget Garbage are actually much older than that implies. The boys were already hovering around 40 when the debut album came out, and Duke is now 74. Even Shirley as the youngest has had a plethora of health issues.
It's got to be a slog for diminishing returns. Unfairly, it's never felt like Garbage have quite obtained the status they should have. They don't sell new music, and they don't seem to be treated with the same "Legendary" gravitas that some of their contemporaries do.