My other hobby is philately, but discussions in various on-line stamp-collecting threads are virtually identical to this discussion.
When I retired and moved to Vancouver in 2000, there were four stamp shops within walking distance, and three more if I was willing to take a 30- or 40-minute bus ride. Now there is just one, although I wouldn't darken the owner's door for any amount of money. There were also four stamp clubs, including the one I eventually became president of. Now there is just one that I'm aware of, and it's barely managing to stumble along with Zoom meetings.
My stamp club had only two young members in the 10 years that I was regularly attending meetings, but none of them lasted more than a year or two at the most. Our annual stamp show, VANPEX, struggled to attract young exhibitors or even visitors. The only Canadian children I ever saw there had parents or grandparents who were involved in the exhibition. One year we did have some 10 or 12 student-exhibitors arrive from India; stamp collecting does seem to be alive and well in Asia. There used to be a very active youth stamp club in Edmonton, but it shut down when its popular adult supervisor died of cancer.
I was a public school teacher for 17 years, in northern BC. I sponsored stamps clubs in two of the schools I taught in, and had good attendance. The clubs attracted an interesting group of students: they were quiet kids who weren't involved in sports or other clubs, but they were very serious about stamp collecting once they learned what it was all about.
One of the members of my stamp club here in Vancouver was also a teacher, and tried to start a stamp club in his school. A large number of student arrived for the first meeting, and many bought stamps that the teacher donated (he was going to use the funds collected to buy more stamps for the kids). At the next meeting, students were disappointed that they couldn't sell their stamps at a big profit. The third and last meeting had no attendees at all. I have a feeling that I would have similar problems if I tried to start a school-based stamp club. Perhaps if I offered a free smart phone to every student who joined....
While the opportunities for engaging with other collectors here in Vancouver, and for buying stamps and collecting supplies locally, have almost disappeared, the virtual stmap clubs and stamp shops seem to be thriving on-line. One of the stamp shops that closed its doors here in Vancouver reopened virtual doors on-line, and has probably quintuppled its business. It has bi-weekly or montly auctions on-line that must bring in hundreds of thousands of dollars — I certainly can't afford to buy most of what they are offering! E-Bay and Delcampe (a French "E-bay") offer just about anything the average collector should ever want or need. And there are a dozen or so very active discussion boards. I don't have any trouble staying engaged with my stamp collecting, assuming that my model building doesn't take too much of my time!
Bob
On the bench: A diorama to illustrate the crash of a Beech T-34B Mentor which I survived in 1962 (I'm using Minicraft's 1/48 model of the Mentor), and a Pegasus model of the submarine Nautilus of 20,000 Leagues Under the Seas fame.