I find the history of furniture really interesting. Not just the changing styles, but also our relationship with it. As I understand it, it wasn't that long ago that a new homeowner would essentially go out and purchase a full set of furniture for their home and that was that. It was expensive. They kept it throughout their lifetime. It lasted. Sometimes furniture was inherited. It had real value and was considered a…
In recent years we've instead been picking up old furniture people are getting rid of (for free) and refurbishing it. The only thing I look for is that it's made of quality materials which isn't hard to find if the furniture is 30+ years old.
I think some people don't want old furniture because it looks dated, but the nice thing about refurbishing is that you can quite easily add modern touches – or just whatever style takes your fancy. Chairs can be equipped with modern pillows and a new finish. Or old cabinets can have new door handles, hinges and a modern paint job, etc. Apart from the furniture we want to look older, I doubt most people would even realise it's all 30+ years old.
Additionally all the furniture we have now can be refurbed when we want a new look and they actually last... It's more effort for sure, but it's nothing an amateur DIYer can do with a few tools and a bit of creativity. And if you don't need them anymore (because you're moving etc) people will happily pay good money for quality refurbed furniture. What people won't buy is some crappy 10 year old Ikea cabinet.