Same thing in NZ. I think we have only 3 hobby shops of any note between the 2 islands and with a population of 4.5.m, and even those are full of plastic with a handful of plane kits, and if you are lucky, a few boat kits (from around $500 upwards for Billings). I think technology, safety police, whingers and lack of council areas for boating have helped kill the hobby here. I don't think there is a decent model boat club in the whole country now..
There are still a few plane clubs around, but again the safety requirements and insurance put people off. The local plane club here is $150 to join, so what young person can afford that each year, plus the cost of models etc etc. There were a lot of model shops and clubs in NZ (trains, boats planes cars etc) up till around yr 2000 but they have almost all disappeared since all the health and safety regulations came in.
Young people have a different outlook these days, and aren't really interested in models, (unless they are ready made, and once used or damaged they are in the bin or forgotten). We built models a lot from necessity, now young people get better pay and can afford better cars, boats, holidays than we could. When I was at high school, no cars were allowed, now outside schools on the roads are Mercs, BMWs Subarus etc.
My first car while at school in 1969 was a 1933 Vauxhall ASXSA 14/6 with a run bearing, bought from a mate for $150 from my holiday jobs. I think everything changes with time, and technology is changing things quickly. Who would have ever thought in the 70s we'd be talking about getting rid of cash !, or sailing big monohulls at 50mph, or Teslas faster than V8s.
There will always be some material to build models from, it's a matter of will anybody want to in 20yrs from now.? Vintage cars and hotrods were the thing years ago, made by the thousands, but where are they all now.? The safety police have got them off the roads, - hardly see one any more except for at shows.