It's not difficult to run that search on Google, but since I'm not very familiar with Europe, I wouldn't know which sources are credible or relevant. If you're already knowledgeable about this topic, it would be far more helpful if you could share references to support your claims directly. That way, we can avoid unnecessary back-and-forth in this thread.
For example, when I did search, I came across this source: https://ec.europa.eu/eurostat/web/products-eurostat-news/-/d.... However, I'm not convinced it supports your point that this trend is 'common' but not in the 40–60 age group. The data show that 5% of people aged 40–60 use it, compared to 12% in the under-40 group. That doesn't strike me as a large enough gap to justify saying it's common in one group but not in the other.
For example, when I did search, I came across this source: https://ec.europa.eu/eurostat/web/products-eurostat-news/-/d.... However, I'm not convinced it supports your point that this trend is 'common' but not in the 40–60 age group. The data show that 5% of people aged 40–60 use it, compared to 12% in the under-40 group. That doesn't strike me as a large enough gap to justify saying it's common in one group but not in the other.