This article points in the opposite direction but it’s worth keeping in mind that we will see other age related diseases on the rise, just because we get better are curing other diseases. We will all die of something and if we get better at treating cancer, then some other disease will mechanically increase. That’s why I would also take with a pinch of salt studies that show a modest increase in a particular disease and try to pin that on a particular technology or food.
If I've read it correctly the article is saying the percentage of instances per age group have decreased over time, but to your point if there are more people reaching those age groups the total number of cases may increase.
