This isn’t something I’ve seen online either tbh. But the UK thing was certainly very popular having talked to people in their 30s-40s, though admittedly this was about 25 years ago. Nowadays life is much harder so just the idea of maybe one day affording a house and having survivable wages is more of concern! The dream of owning a pub is so far above what current 30yos could reach. Plus, pubs are all owned by breweries these days so the of the old freehold pub has died.

In Japan, it’s something I’ve seen several times in Japanese documentaries on NHK, which have been translated. Again, I don’t know if this is still the dream of the younger folks - it was 50yos that wanted to do that previously. The US equivalent was “the American Dream” that people still wish for, even though it’s unlikely. It’s a similar feeling, or hope, that for most won’t come true, no matter what they do. These aren’t “specific online spaces”. These are the hopes and dreams for a better future - if you need to have those, you’re making a statement.